1 /* DWARF 2 debugging format support for GDB.
3 Copyright (C) 1994-2013 Free Software Foundation, Inc.
5 Adapted by Gary Funck (gary@intrepid.com), Intrepid Technology,
6 Inc. with support from Florida State University (under contract
7 with the Ada Joint Program Office), and Silicon Graphics, Inc.
8 Initial contribution by Brent Benson, Harris Computer Systems, Inc.,
9 based on Fred Fish's (Cygnus Support) implementation of DWARF 1
12 This file is part of GDB.
14 This program is free software; you can redistribute it and/or modify
15 it under the terms of the GNU General Public License as published by
16 the Free Software Foundation; either version 3 of the License, or
17 (at your option) any later version.
19 This program is distributed in the hope that it will be useful,
20 but WITHOUT ANY WARRANTY; without even the implied warranty of
21 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 GNU General Public License for more details.
24 You should have received a copy of the GNU General Public License
25 along with this program. If not, see <http://www.gnu.org/licenses/>. */
27 /* FIXME: Various die-reading functions need to be more careful with
28 reading off the end of the section.
29 E.g., load_partial_dies, read_partial_die. */
40 #include "gdb-demangle.h"
41 #include "expression.h"
42 #include "filenames.h" /* for DOSish file names */
45 #include "complaints.h"
47 #include "dwarf2expr.h"
48 #include "dwarf2loc.h"
49 #include "cp-support.h"
55 #include "typeprint.h"
58 #include "exceptions.h"
60 #include "completer.h"
65 #include "gdbcore.h" /* for gnutarget */
66 #include "gdb/gdb-index.h"
72 #include "gdb_string.h"
73 #include "gdb_assert.h"
74 #include <sys/types.h>
76 typedef struct symbol
*symbolp
;
79 /* When non-zero, print basic high level tracing messages.
80 This is in contrast to the low level DIE reading of dwarf2_die_debug. */
81 static int dwarf2_read_debug
= 0;
83 /* When non-zero, dump DIEs after they are read in. */
84 static unsigned int dwarf2_die_debug
= 0;
86 /* When non-zero, cross-check physname against demangler. */
87 static int check_physname
= 0;
89 /* When non-zero, do not reject deprecated .gdb_index sections. */
90 static int use_deprecated_index_sections
= 0;
92 static const struct objfile_data
*dwarf2_objfile_data_key
;
94 struct dwarf2_section_info
99 /* True if we have tried to read this section. */
103 typedef struct dwarf2_section_info dwarf2_section_info_def
;
104 DEF_VEC_O (dwarf2_section_info_def
);
106 /* All offsets in the index are of this type. It must be
107 architecture-independent. */
108 typedef uint32_t offset_type
;
110 DEF_VEC_I (offset_type
);
112 /* Ensure only legit values are used. */
113 #define DW2_GDB_INDEX_SYMBOL_STATIC_SET_VALUE(cu_index, value) \
115 gdb_assert ((unsigned int) (value) <= 1); \
116 GDB_INDEX_SYMBOL_STATIC_SET_VALUE((cu_index), (value)); \
119 /* Ensure only legit values are used. */
120 #define DW2_GDB_INDEX_SYMBOL_KIND_SET_VALUE(cu_index, value) \
122 gdb_assert ((value) >= GDB_INDEX_SYMBOL_KIND_TYPE \
123 && (value) <= GDB_INDEX_SYMBOL_KIND_OTHER); \
124 GDB_INDEX_SYMBOL_KIND_SET_VALUE((cu_index), (value)); \
127 /* Ensure we don't use more than the alloted nuber of bits for the CU. */
128 #define DW2_GDB_INDEX_CU_SET_VALUE(cu_index, value) \
130 gdb_assert (((value) & ~GDB_INDEX_CU_MASK) == 0); \
131 GDB_INDEX_CU_SET_VALUE((cu_index), (value)); \
134 /* A description of the mapped index. The file format is described in
135 a comment by the code that writes the index. */
138 /* Index data format version. */
141 /* The total length of the buffer. */
144 /* A pointer to the address table data. */
145 const gdb_byte
*address_table
;
147 /* Size of the address table data in bytes. */
148 offset_type address_table_size
;
150 /* The symbol table, implemented as a hash table. */
151 const offset_type
*symbol_table
;
153 /* Size in slots, each slot is 2 offset_types. */
154 offset_type symbol_table_slots
;
156 /* A pointer to the constant pool. */
157 const char *constant_pool
;
160 typedef struct dwarf2_per_cu_data
*dwarf2_per_cu_ptr
;
161 DEF_VEC_P (dwarf2_per_cu_ptr
);
163 /* Collection of data recorded per objfile.
164 This hangs off of dwarf2_objfile_data_key. */
166 struct dwarf2_per_objfile
168 struct dwarf2_section_info info
;
169 struct dwarf2_section_info abbrev
;
170 struct dwarf2_section_info line
;
171 struct dwarf2_section_info loc
;
172 struct dwarf2_section_info macinfo
;
173 struct dwarf2_section_info macro
;
174 struct dwarf2_section_info str
;
175 struct dwarf2_section_info ranges
;
176 struct dwarf2_section_info addr
;
177 struct dwarf2_section_info frame
;
178 struct dwarf2_section_info eh_frame
;
179 struct dwarf2_section_info gdb_index
;
181 VEC (dwarf2_section_info_def
) *types
;
184 struct objfile
*objfile
;
186 /* Table of all the compilation units. This is used to locate
187 the target compilation unit of a particular reference. */
188 struct dwarf2_per_cu_data
**all_comp_units
;
190 /* The number of compilation units in ALL_COMP_UNITS. */
193 /* The number of .debug_types-related CUs. */
196 /* The .debug_types-related CUs (TUs). */
197 struct signatured_type
**all_type_units
;
199 /* The number of entries in all_type_unit_groups. */
200 int n_type_unit_groups
;
202 /* Table of type unit groups.
203 This exists to make it easy to iterate over all CUs and TU groups. */
204 struct type_unit_group
**all_type_unit_groups
;
206 /* Table of struct type_unit_group objects.
207 The hash key is the DW_AT_stmt_list value. */
208 htab_t type_unit_groups
;
210 /* A table mapping .debug_types signatures to its signatured_type entry.
211 This is NULL if the .debug_types section hasn't been read in yet. */
212 htab_t signatured_types
;
214 /* Type unit statistics, to see how well the scaling improvements
218 int nr_uniq_abbrev_tables
;
220 int nr_symtab_sharers
;
221 int nr_stmt_less_type_units
;
224 /* A chain of compilation units that are currently read in, so that
225 they can be freed later. */
226 struct dwarf2_per_cu_data
*read_in_chain
;
228 /* A table mapping DW_AT_dwo_name values to struct dwo_file objects.
229 This is NULL if the table hasn't been allocated yet. */
232 /* Non-zero if we've check for whether there is a DWP file. */
235 /* The DWP file if there is one, or NULL. */
236 struct dwp_file
*dwp_file
;
238 /* The shared '.dwz' file, if one exists. This is used when the
239 original data was compressed using 'dwz -m'. */
240 struct dwz_file
*dwz_file
;
242 /* A flag indicating wether this objfile has a section loaded at a
244 int has_section_at_zero
;
246 /* True if we are using the mapped index,
247 or we are faking it for OBJF_READNOW's sake. */
248 unsigned char using_index
;
250 /* The mapped index, or NULL if .gdb_index is missing or not being used. */
251 struct mapped_index
*index_table
;
253 /* When using index_table, this keeps track of all quick_file_names entries.
254 TUs typically share line table entries with a CU, so we maintain a
255 separate table of all line table entries to support the sharing.
256 Note that while there can be way more TUs than CUs, we've already
257 sorted all the TUs into "type unit groups", grouped by their
258 DW_AT_stmt_list value. Therefore the only sharing done here is with a
259 CU and its associated TU group if there is one. */
260 htab_t quick_file_names_table
;
262 /* Set during partial symbol reading, to prevent queueing of full
264 int reading_partial_symbols
;
266 /* Table mapping type DIEs to their struct type *.
267 This is NULL if not allocated yet.
268 The mapping is done via (CU/TU signature + DIE offset) -> type. */
269 htab_t die_type_hash
;
271 /* The CUs we recently read. */
272 VEC (dwarf2_per_cu_ptr
) *just_read_cus
;
275 static struct dwarf2_per_objfile
*dwarf2_per_objfile
;
277 /* Default names of the debugging sections. */
279 /* Note that if the debugging section has been compressed, it might
280 have a name like .zdebug_info. */
282 static const struct dwarf2_debug_sections dwarf2_elf_names
=
284 { ".debug_info", ".zdebug_info" },
285 { ".debug_abbrev", ".zdebug_abbrev" },
286 { ".debug_line", ".zdebug_line" },
287 { ".debug_loc", ".zdebug_loc" },
288 { ".debug_macinfo", ".zdebug_macinfo" },
289 { ".debug_macro", ".zdebug_macro" },
290 { ".debug_str", ".zdebug_str" },
291 { ".debug_ranges", ".zdebug_ranges" },
292 { ".debug_types", ".zdebug_types" },
293 { ".debug_addr", ".zdebug_addr" },
294 { ".debug_frame", ".zdebug_frame" },
295 { ".eh_frame", NULL
},
296 { ".gdb_index", ".zgdb_index" },
300 /* List of DWO/DWP sections. */
302 static const struct dwop_section_names
304 struct dwarf2_section_names abbrev_dwo
;
305 struct dwarf2_section_names info_dwo
;
306 struct dwarf2_section_names line_dwo
;
307 struct dwarf2_section_names loc_dwo
;
308 struct dwarf2_section_names macinfo_dwo
;
309 struct dwarf2_section_names macro_dwo
;
310 struct dwarf2_section_names str_dwo
;
311 struct dwarf2_section_names str_offsets_dwo
;
312 struct dwarf2_section_names types_dwo
;
313 struct dwarf2_section_names cu_index
;
314 struct dwarf2_section_names tu_index
;
318 { ".debug_abbrev.dwo", ".zdebug_abbrev.dwo" },
319 { ".debug_info.dwo", ".zdebug_info.dwo" },
320 { ".debug_line.dwo", ".zdebug_line.dwo" },
321 { ".debug_loc.dwo", ".zdebug_loc.dwo" },
322 { ".debug_macinfo.dwo", ".zdebug_macinfo.dwo" },
323 { ".debug_macro.dwo", ".zdebug_macro.dwo" },
324 { ".debug_str.dwo", ".zdebug_str.dwo" },
325 { ".debug_str_offsets.dwo", ".zdebug_str_offsets.dwo" },
326 { ".debug_types.dwo", ".zdebug_types.dwo" },
327 { ".debug_cu_index", ".zdebug_cu_index" },
328 { ".debug_tu_index", ".zdebug_tu_index" },
331 /* local data types */
333 /* The data in a compilation unit header, after target2host
334 translation, looks like this. */
335 struct comp_unit_head
339 unsigned char addr_size
;
340 unsigned char signed_addr_p
;
341 sect_offset abbrev_offset
;
343 /* Size of file offsets; either 4 or 8. */
344 unsigned int offset_size
;
346 /* Size of the length field; either 4 or 12. */
347 unsigned int initial_length_size
;
349 /* Offset to the first byte of this compilation unit header in the
350 .debug_info section, for resolving relative reference dies. */
353 /* Offset to first die in this cu from the start of the cu.
354 This will be the first byte following the compilation unit header. */
355 cu_offset first_die_offset
;
358 /* Type used for delaying computation of method physnames.
359 See comments for compute_delayed_physnames. */
360 struct delayed_method_info
362 /* The type to which the method is attached, i.e., its parent class. */
365 /* The index of the method in the type's function fieldlists. */
368 /* The index of the method in the fieldlist. */
371 /* The name of the DIE. */
374 /* The DIE associated with this method. */
375 struct die_info
*die
;
378 typedef struct delayed_method_info delayed_method_info
;
379 DEF_VEC_O (delayed_method_info
);
381 /* Internal state when decoding a particular compilation unit. */
384 /* The objfile containing this compilation unit. */
385 struct objfile
*objfile
;
387 /* The header of the compilation unit. */
388 struct comp_unit_head header
;
390 /* Base address of this compilation unit. */
391 CORE_ADDR base_address
;
393 /* Non-zero if base_address has been set. */
396 /* The language we are debugging. */
397 enum language language
;
398 const struct language_defn
*language_defn
;
400 const char *producer
;
402 /* The generic symbol table building routines have separate lists for
403 file scope symbols and all all other scopes (local scopes). So
404 we need to select the right one to pass to add_symbol_to_list().
405 We do it by keeping a pointer to the correct list in list_in_scope.
407 FIXME: The original dwarf code just treated the file scope as the
408 first local scope, and all other local scopes as nested local
409 scopes, and worked fine. Check to see if we really need to
410 distinguish these in buildsym.c. */
411 struct pending
**list_in_scope
;
413 /* The abbrev table for this CU.
414 Normally this points to the abbrev table in the objfile.
415 But if DWO_UNIT is non-NULL this is the abbrev table in the DWO file. */
416 struct abbrev_table
*abbrev_table
;
418 /* Hash table holding all the loaded partial DIEs
419 with partial_die->offset.SECT_OFF as hash. */
422 /* Storage for things with the same lifetime as this read-in compilation
423 unit, including partial DIEs. */
424 struct obstack comp_unit_obstack
;
426 /* When multiple dwarf2_cu structures are living in memory, this field
427 chains them all together, so that they can be released efficiently.
428 We will probably also want a generation counter so that most-recently-used
429 compilation units are cached... */
430 struct dwarf2_per_cu_data
*read_in_chain
;
432 /* Backchain to our per_cu entry if the tree has been built. */
433 struct dwarf2_per_cu_data
*per_cu
;
435 /* How many compilation units ago was this CU last referenced? */
438 /* A hash table of DIE cu_offset for following references with
439 die_info->offset.sect_off as hash. */
442 /* Full DIEs if read in. */
443 struct die_info
*dies
;
445 /* A set of pointers to dwarf2_per_cu_data objects for compilation
446 units referenced by this one. Only set during full symbol processing;
447 partial symbol tables do not have dependencies. */
450 /* Header data from the line table, during full symbol processing. */
451 struct line_header
*line_header
;
453 /* A list of methods which need to have physnames computed
454 after all type information has been read. */
455 VEC (delayed_method_info
) *method_list
;
457 /* To be copied to symtab->call_site_htab. */
458 htab_t call_site_htab
;
460 /* Non-NULL if this CU came from a DWO file.
461 There is an invariant here that is important to remember:
462 Except for attributes copied from the top level DIE in the "main"
463 (or "stub") file in preparation for reading the DWO file
464 (e.g., DW_AT_GNU_addr_base), we KISS: there is only *one* CU.
465 Either there isn't a DWO file (in which case this is NULL and the point
466 is moot), or there is and either we're not going to read it (in which
467 case this is NULL) or there is and we are reading it (in which case this
469 struct dwo_unit
*dwo_unit
;
471 /* The DW_AT_addr_base attribute if present, zero otherwise
472 (zero is a valid value though).
473 Note this value comes from the stub CU/TU's DIE. */
476 /* The DW_AT_ranges_base attribute if present, zero otherwise
477 (zero is a valid value though).
478 Note this value comes from the stub CU/TU's DIE.
479 Also note that the value is zero in the non-DWO case so this value can
480 be used without needing to know whether DWO files are in use or not.
481 N.B. This does not apply to DW_AT_ranges appearing in
482 DW_TAG_compile_unit dies. This is a bit of a wart, consider if ever
483 DW_AT_ranges appeared in the DW_TAG_compile_unit of DWO DIEs: then
484 DW_AT_ranges_base *would* have to be applied, and we'd have to care
485 whether the DW_AT_ranges attribute came from the skeleton or DWO. */
486 ULONGEST ranges_base
;
488 /* Mark used when releasing cached dies. */
489 unsigned int mark
: 1;
491 /* This CU references .debug_loc. See the symtab->locations_valid field.
492 This test is imperfect as there may exist optimized debug code not using
493 any location list and still facing inlining issues if handled as
494 unoptimized code. For a future better test see GCC PR other/32998. */
495 unsigned int has_loclist
: 1;
497 /* These cache the results for producer_is_* fields. CHECKED_PRODUCER is set
498 if all the producer_is_* fields are valid. This information is cached
499 because profiling CU expansion showed excessive time spent in
500 producer_is_gxx_lt_4_6. */
501 unsigned int checked_producer
: 1;
502 unsigned int producer_is_gxx_lt_4_6
: 1;
503 unsigned int producer_is_gcc_lt_4_3
: 1;
504 unsigned int producer_is_icc
: 1;
506 /* When set, the file that we're processing is known to have
507 debugging info for C++ namespaces. GCC 3.3.x did not produce
508 this information, but later versions do. */
510 unsigned int processing_has_namespace_info
: 1;
513 /* Persistent data held for a compilation unit, even when not
514 processing it. We put a pointer to this structure in the
515 read_symtab_private field of the psymtab. */
517 struct dwarf2_per_cu_data
519 /* The start offset and length of this compilation unit.
520 NOTE: Unlike comp_unit_head.length, this length includes
522 If the DIE refers to a DWO file, this is always of the original die,
527 /* Flag indicating this compilation unit will be read in before
528 any of the current compilation units are processed. */
529 unsigned int queued
: 1;
531 /* This flag will be set when reading partial DIEs if we need to load
532 absolutely all DIEs for this compilation unit, instead of just the ones
533 we think are interesting. It gets set if we look for a DIE in the
534 hash table and don't find it. */
535 unsigned int load_all_dies
: 1;
537 /* Non-zero if this CU is from .debug_types. */
538 unsigned int is_debug_types
: 1;
540 /* Non-zero if this CU is from the .dwz file. */
541 unsigned int is_dwz
: 1;
543 /* The section this CU/TU lives in.
544 If the DIE refers to a DWO file, this is always the original die,
546 struct dwarf2_section_info
*info_or_types_section
;
548 /* Set to non-NULL iff this CU is currently loaded. When it gets freed out
549 of the CU cache it gets reset to NULL again. */
550 struct dwarf2_cu
*cu
;
552 /* The corresponding objfile.
553 Normally we can get the objfile from dwarf2_per_objfile.
554 However we can enter this file with just a "per_cu" handle. */
555 struct objfile
*objfile
;
557 /* When using partial symbol tables, the 'psymtab' field is active.
558 Otherwise the 'quick' field is active. */
561 /* The partial symbol table associated with this compilation unit,
562 or NULL for unread partial units. */
563 struct partial_symtab
*psymtab
;
565 /* Data needed by the "quick" functions. */
566 struct dwarf2_per_cu_quick_data
*quick
;
569 /* The CUs we import using DW_TAG_imported_unit. This is filled in
570 while reading psymtabs, used to compute the psymtab dependencies,
571 and then cleared. Then it is filled in again while reading full
572 symbols, and only deleted when the objfile is destroyed.
574 This is also used to work around a difference between the way gold
575 generates .gdb_index version <=7 and the way gdb does. Arguably this
576 is a gold bug. For symbols coming from TUs, gold records in the index
577 the CU that includes the TU instead of the TU itself. This breaks
578 dw2_lookup_symbol: It assumes that if the index says symbol X lives
579 in CU/TU Y, then one need only expand Y and a subsequent lookup in Y
580 will find X. Alas TUs live in their own symtab, so after expanding CU Y
581 we need to look in TU Z to find X. Fortunately, this is akin to
582 DW_TAG_imported_unit, so we just use the same mechanism: For
583 .gdb_index version <=7 this also records the TUs that the CU referred
584 to. Concurrently with this change gdb was modified to emit version 8
585 indices so we only pay a price for gold generated indices. */
586 VEC (dwarf2_per_cu_ptr
) *imported_symtabs
;
588 /* Type units are grouped by their DW_AT_stmt_list entry so that they
589 can share them. If this is a TU, this points to the containing
591 struct type_unit_group
*type_unit_group
;
594 /* Entry in the signatured_types hash table. */
596 struct signatured_type
598 /* The "per_cu" object of this type.
599 N.B.: This is the first member so that it's easy to convert pointers
601 struct dwarf2_per_cu_data per_cu
;
603 /* The type's signature. */
606 /* Offset in the TU of the type's DIE, as read from the TU header.
607 If the definition lives in a DWO file, this value is unusable. */
608 cu_offset type_offset_in_tu
;
610 /* Offset in the section of the type's DIE.
611 If the definition lives in a DWO file, this is the offset in the
612 .debug_types.dwo section.
613 The value is zero until the actual value is known.
614 Zero is otherwise not a valid section offset. */
615 sect_offset type_offset_in_section
;
618 /* A struct that can be used as a hash key for tables based on DW_AT_stmt_list.
619 This includes type_unit_group and quick_file_names. */
621 struct stmt_list_hash
623 /* The DWO unit this table is from or NULL if there is none. */
624 struct dwo_unit
*dwo_unit
;
626 /* Offset in .debug_line or .debug_line.dwo. */
627 sect_offset line_offset
;
630 /* Each element of dwarf2_per_objfile->type_unit_groups is a pointer to
631 an object of this type. */
633 struct type_unit_group
635 /* dwarf2read.c's main "handle" on the symtab.
636 To simplify things we create an artificial CU that "includes" all the
637 type units using this stmt_list so that the rest of the code still has
638 a "per_cu" handle on the symtab.
639 This PER_CU is recognized by having no section. */
640 #define IS_TYPE_UNIT_GROUP(per_cu) ((per_cu)->info_or_types_section == NULL)
641 struct dwarf2_per_cu_data per_cu
;
645 /* The TUs that share this DW_AT_stmt_list entry.
646 This is added to while parsing type units to build partial symtabs,
647 and is deleted afterwards and not used again. */
648 VEC (dwarf2_per_cu_ptr
) *tus
;
650 /* When reading the line table in "quick" functions, we need a real TU.
651 Any will do, we know they all share the same DW_AT_stmt_list entry.
652 For simplicity's sake, we pick the first one. */
653 struct dwarf2_per_cu_data
*first_tu
;
656 /* The primary symtab.
657 Type units in a group needn't all be defined in the same source file,
658 so we create an essentially anonymous symtab as the primary symtab. */
659 struct symtab
*primary_symtab
;
661 /* The data used to construct the hash key. */
662 struct stmt_list_hash hash
;
664 /* The number of symtabs from the line header.
665 The value here must match line_header.num_file_names. */
666 unsigned int num_symtabs
;
668 /* The symbol tables for this TU (obtained from the files listed in
670 WARNING: The order of entries here must match the order of entries
671 in the line header. After the first TU using this type_unit_group, the
672 line header for the subsequent TUs is recreated from this. This is done
673 because we need to use the same symtabs for each TU using the same
674 DW_AT_stmt_list value. Also note that symtabs may be repeated here,
675 there's no guarantee the line header doesn't have duplicate entries. */
676 struct symtab
**symtabs
;
679 /* These sections are what may appear in a DWO file. */
683 struct dwarf2_section_info abbrev
;
684 struct dwarf2_section_info line
;
685 struct dwarf2_section_info loc
;
686 struct dwarf2_section_info macinfo
;
687 struct dwarf2_section_info macro
;
688 struct dwarf2_section_info str
;
689 struct dwarf2_section_info str_offsets
;
690 /* In the case of a virtual DWO file, these two are unused. */
691 struct dwarf2_section_info info
;
692 VEC (dwarf2_section_info_def
) *types
;
695 /* Common bits of DWO CUs/TUs. */
699 /* Backlink to the containing struct dwo_file. */
700 struct dwo_file
*dwo_file
;
702 /* The "id" that distinguishes this CU/TU.
703 .debug_info calls this "dwo_id", .debug_types calls this "signature".
704 Since signatures came first, we stick with it for consistency. */
707 /* The section this CU/TU lives in, in the DWO file. */
708 struct dwarf2_section_info
*info_or_types_section
;
710 /* Same as dwarf2_per_cu_data:{offset,length} but for the DWO section. */
714 /* For types, offset in the type's DIE of the type defined by this TU. */
715 cu_offset type_offset_in_tu
;
718 /* Data for one DWO file.
719 This includes virtual DWO files that have been packaged into a
724 /* The DW_AT_GNU_dwo_name attribute. This is the hash key.
725 For virtual DWO files the name is constructed from the section offsets
726 of abbrev,line,loc,str_offsets so that we combine virtual DWO files
727 from related CU+TUs. */
730 /* The bfd, when the file is open. Otherwise this is NULL.
731 This is unused(NULL) for virtual DWO files where we use dwp_file.dbfd. */
734 /* Section info for this file. */
735 struct dwo_sections sections
;
737 /* Table of CUs in the file.
738 Each element is a struct dwo_unit. */
741 /* Table of TUs in the file.
742 Each element is a struct dwo_unit. */
746 /* These sections are what may appear in a DWP file. */
750 struct dwarf2_section_info str
;
751 struct dwarf2_section_info cu_index
;
752 struct dwarf2_section_info tu_index
;
753 /* The .debug_info.dwo, .debug_types.dwo, and other sections are referenced
754 by section number. We don't need to record them here. */
757 /* These sections are what may appear in a virtual DWO file. */
759 struct virtual_dwo_sections
761 struct dwarf2_section_info abbrev
;
762 struct dwarf2_section_info line
;
763 struct dwarf2_section_info loc
;
764 struct dwarf2_section_info macinfo
;
765 struct dwarf2_section_info macro
;
766 struct dwarf2_section_info str_offsets
;
767 /* Each DWP hash table entry records one CU or one TU.
768 That is recorded here, and copied to dwo_unit.info_or_types_section. */
769 struct dwarf2_section_info info_or_types
;
772 /* Contents of DWP hash tables. */
774 struct dwp_hash_table
776 uint32_t nr_units
, nr_slots
;
777 const gdb_byte
*hash_table
, *unit_table
, *section_pool
;
780 /* Data for one DWP file. */
784 /* Name of the file. */
787 /* The bfd, when the file is open. Otherwise this is NULL. */
790 /* Section info for this file. */
791 struct dwp_sections sections
;
793 /* Table of CUs in the file. */
794 const struct dwp_hash_table
*cus
;
796 /* Table of TUs in the file. */
797 const struct dwp_hash_table
*tus
;
799 /* Table of loaded CUs/TUs. Each entry is a struct dwo_unit *. */
802 /* Table to map ELF section numbers to their sections. */
803 unsigned int num_sections
;
804 asection
**elf_sections
;
807 /* This represents a '.dwz' file. */
811 /* A dwz file can only contain a few sections. */
812 struct dwarf2_section_info abbrev
;
813 struct dwarf2_section_info info
;
814 struct dwarf2_section_info str
;
815 struct dwarf2_section_info line
;
816 struct dwarf2_section_info macro
;
817 struct dwarf2_section_info gdb_index
;
823 /* Struct used to pass misc. parameters to read_die_and_children, et
824 al. which are used for both .debug_info and .debug_types dies.
825 All parameters here are unchanging for the life of the call. This
826 struct exists to abstract away the constant parameters of die reading. */
828 struct die_reader_specs
830 /* die_section->asection->owner. */
833 /* The CU of the DIE we are parsing. */
834 struct dwarf2_cu
*cu
;
836 /* Non-NULL if reading a DWO file (including one packaged into a DWP). */
837 struct dwo_file
*dwo_file
;
839 /* The section the die comes from.
840 This is either .debug_info or .debug_types, or the .dwo variants. */
841 struct dwarf2_section_info
*die_section
;
843 /* die_section->buffer. */
846 /* The end of the buffer. */
847 const gdb_byte
*buffer_end
;
850 /* Type of function passed to init_cutu_and_read_dies, et.al. */
851 typedef void (die_reader_func_ftype
) (const struct die_reader_specs
*reader
,
853 struct die_info
*comp_unit_die
,
857 /* The line number information for a compilation unit (found in the
858 .debug_line section) begins with a "statement program header",
859 which contains the following information. */
862 unsigned int total_length
;
863 unsigned short version
;
864 unsigned int header_length
;
865 unsigned char minimum_instruction_length
;
866 unsigned char maximum_ops_per_instruction
;
867 unsigned char default_is_stmt
;
869 unsigned char line_range
;
870 unsigned char opcode_base
;
872 /* standard_opcode_lengths[i] is the number of operands for the
873 standard opcode whose value is i. This means that
874 standard_opcode_lengths[0] is unused, and the last meaningful
875 element is standard_opcode_lengths[opcode_base - 1]. */
876 unsigned char *standard_opcode_lengths
;
878 /* The include_directories table. NOTE! These strings are not
879 allocated with xmalloc; instead, they are pointers into
880 debug_line_buffer. If you try to free them, `free' will get
882 unsigned int num_include_dirs
, include_dirs_size
;
885 /* The file_names table. NOTE! These strings are not allocated
886 with xmalloc; instead, they are pointers into debug_line_buffer.
887 Don't try to free them directly. */
888 unsigned int num_file_names
, file_names_size
;
892 unsigned int dir_index
;
893 unsigned int mod_time
;
895 int included_p
; /* Non-zero if referenced by the Line Number Program. */
896 struct symtab
*symtab
; /* The associated symbol table, if any. */
899 /* The start and end of the statement program following this
900 header. These point into dwarf2_per_objfile->line_buffer. */
901 gdb_byte
*statement_program_start
, *statement_program_end
;
904 /* When we construct a partial symbol table entry we only
905 need this much information. */
906 struct partial_die_info
908 /* Offset of this DIE. */
911 /* DWARF-2 tag for this DIE. */
912 ENUM_BITFIELD(dwarf_tag
) tag
: 16;
914 /* Assorted flags describing the data found in this DIE. */
915 unsigned int has_children
: 1;
916 unsigned int is_external
: 1;
917 unsigned int is_declaration
: 1;
918 unsigned int has_type
: 1;
919 unsigned int has_specification
: 1;
920 unsigned int has_pc_info
: 1;
921 unsigned int may_be_inlined
: 1;
923 /* Flag set if the SCOPE field of this structure has been
925 unsigned int scope_set
: 1;
927 /* Flag set if the DIE has a byte_size attribute. */
928 unsigned int has_byte_size
: 1;
930 /* Flag set if any of the DIE's children are template arguments. */
931 unsigned int has_template_arguments
: 1;
933 /* Flag set if fixup_partial_die has been called on this die. */
934 unsigned int fixup_called
: 1;
936 /* Flag set if DW_TAG_imported_unit uses DW_FORM_GNU_ref_alt. */
937 unsigned int is_dwz
: 1;
939 /* Flag set if spec_offset uses DW_FORM_GNU_ref_alt. */
940 unsigned int spec_is_dwz
: 1;
942 /* The name of this DIE. Normally the value of DW_AT_name, but
943 sometimes a default name for unnamed DIEs. */
946 /* The linkage name, if present. */
947 const char *linkage_name
;
949 /* The scope to prepend to our children. This is generally
950 allocated on the comp_unit_obstack, so will disappear
951 when this compilation unit leaves the cache. */
954 /* Some data associated with the partial DIE. The tag determines
955 which field is live. */
958 /* The location description associated with this DIE, if any. */
959 struct dwarf_block
*locdesc
;
960 /* The offset of an import, for DW_TAG_imported_unit. */
964 /* If HAS_PC_INFO, the PC range associated with this DIE. */
968 /* Pointer into the info_buffer (or types_buffer) pointing at the target of
969 DW_AT_sibling, if any. */
970 /* NOTE: This member isn't strictly necessary, read_partial_die could
971 return DW_AT_sibling values to its caller load_partial_dies. */
974 /* If HAS_SPECIFICATION, the offset of the DIE referred to by
975 DW_AT_specification (or DW_AT_abstract_origin or
977 sect_offset spec_offset
;
979 /* Pointers to this DIE's parent, first child, and next sibling,
981 struct partial_die_info
*die_parent
, *die_child
, *die_sibling
;
984 /* This data structure holds the information of an abbrev. */
987 unsigned int number
; /* number identifying abbrev */
988 enum dwarf_tag tag
; /* dwarf tag */
989 unsigned short has_children
; /* boolean */
990 unsigned short num_attrs
; /* number of attributes */
991 struct attr_abbrev
*attrs
; /* an array of attribute descriptions */
992 struct abbrev_info
*next
; /* next in chain */
997 ENUM_BITFIELD(dwarf_attribute
) name
: 16;
998 ENUM_BITFIELD(dwarf_form
) form
: 16;
1001 /* Size of abbrev_table.abbrev_hash_table. */
1002 #define ABBREV_HASH_SIZE 121
1004 /* Top level data structure to contain an abbreviation table. */
1008 /* Where the abbrev table came from.
1009 This is used as a sanity check when the table is used. */
1012 /* Storage for the abbrev table. */
1013 struct obstack abbrev_obstack
;
1015 /* Hash table of abbrevs.
1016 This is an array of size ABBREV_HASH_SIZE allocated in abbrev_obstack.
1017 It could be statically allocated, but the previous code didn't so we
1019 struct abbrev_info
**abbrevs
;
1022 /* Attributes have a name and a value. */
1025 ENUM_BITFIELD(dwarf_attribute
) name
: 16;
1026 ENUM_BITFIELD(dwarf_form
) form
: 15;
1028 /* Has DW_STRING already been updated by dwarf2_canonicalize_name? This
1029 field should be in u.str (existing only for DW_STRING) but it is kept
1030 here for better struct attribute alignment. */
1031 unsigned int string_is_canonical
: 1;
1036 struct dwarf_block
*blk
;
1040 struct signatured_type
*signatured_type
;
1045 /* This data structure holds a complete die structure. */
1048 /* DWARF-2 tag for this DIE. */
1049 ENUM_BITFIELD(dwarf_tag
) tag
: 16;
1051 /* Number of attributes */
1052 unsigned char num_attrs
;
1054 /* True if we're presently building the full type name for the
1055 type derived from this DIE. */
1056 unsigned char building_fullname
: 1;
1059 unsigned int abbrev
;
1061 /* Offset in .debug_info or .debug_types section. */
1064 /* The dies in a compilation unit form an n-ary tree. PARENT
1065 points to this die's parent; CHILD points to the first child of
1066 this node; and all the children of a given node are chained
1067 together via their SIBLING fields. */
1068 struct die_info
*child
; /* Its first child, if any. */
1069 struct die_info
*sibling
; /* Its next sibling, if any. */
1070 struct die_info
*parent
; /* Its parent, if any. */
1072 /* An array of attributes, with NUM_ATTRS elements. There may be
1073 zero, but it's not common and zero-sized arrays are not
1074 sufficiently portable C. */
1075 struct attribute attrs
[1];
1078 /* Get at parts of an attribute structure. */
1080 #define DW_STRING(attr) ((attr)->u.str)
1081 #define DW_STRING_IS_CANONICAL(attr) ((attr)->string_is_canonical)
1082 #define DW_UNSND(attr) ((attr)->u.unsnd)
1083 #define DW_BLOCK(attr) ((attr)->u.blk)
1084 #define DW_SND(attr) ((attr)->u.snd)
1085 #define DW_ADDR(attr) ((attr)->u.addr)
1086 #define DW_SIGNATURED_TYPE(attr) ((attr)->u.signatured_type)
1088 /* Blocks are a bunch of untyped bytes. */
1093 /* Valid only if SIZE is not zero. */
1097 #ifndef ATTR_ALLOC_CHUNK
1098 #define ATTR_ALLOC_CHUNK 4
1101 /* Allocate fields for structs, unions and enums in this size. */
1102 #ifndef DW_FIELD_ALLOC_CHUNK
1103 #define DW_FIELD_ALLOC_CHUNK 4
1106 /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte,
1107 but this would require a corresponding change in unpack_field_as_long
1109 static int bits_per_byte
= 8;
1111 /* The routines that read and process dies for a C struct or C++ class
1112 pass lists of data member fields and lists of member function fields
1113 in an instance of a field_info structure, as defined below. */
1116 /* List of data member and baseclasses fields. */
1119 struct nextfield
*next
;
1124 *fields
, *baseclasses
;
1126 /* Number of fields (including baseclasses). */
1129 /* Number of baseclasses. */
1132 /* Set if the accesibility of one of the fields is not public. */
1133 int non_public_fields
;
1135 /* Member function fields array, entries are allocated in the order they
1136 are encountered in the object file. */
1139 struct nextfnfield
*next
;
1140 struct fn_field fnfield
;
1144 /* Member function fieldlist array, contains name of possibly overloaded
1145 member function, number of overloaded member functions and a pointer
1146 to the head of the member function field chain. */
1151 struct nextfnfield
*head
;
1155 /* Number of entries in the fnfieldlists array. */
1158 /* typedefs defined inside this class. TYPEDEF_FIELD_LIST contains head of
1159 a NULL terminated list of TYPEDEF_FIELD_LIST_COUNT elements. */
1160 struct typedef_field_list
1162 struct typedef_field field
;
1163 struct typedef_field_list
*next
;
1165 *typedef_field_list
;
1166 unsigned typedef_field_list_count
;
1169 /* One item on the queue of compilation units to read in full symbols
1171 struct dwarf2_queue_item
1173 struct dwarf2_per_cu_data
*per_cu
;
1174 enum language pretend_language
;
1175 struct dwarf2_queue_item
*next
;
1178 /* The current queue. */
1179 static struct dwarf2_queue_item
*dwarf2_queue
, *dwarf2_queue_tail
;
1181 /* Loaded secondary compilation units are kept in memory until they
1182 have not been referenced for the processing of this many
1183 compilation units. Set this to zero to disable caching. Cache
1184 sizes of up to at least twenty will improve startup time for
1185 typical inter-CU-reference binaries, at an obvious memory cost. */
1186 static int dwarf2_max_cache_age
= 5;
1188 show_dwarf2_max_cache_age (struct ui_file
*file
, int from_tty
,
1189 struct cmd_list_element
*c
, const char *value
)
1191 fprintf_filtered (file
, _("The upper bound on the age of cached "
1192 "dwarf2 compilation units is %s.\n"),
1197 /* Various complaints about symbol reading that don't abort the process. */
1200 dwarf2_statement_list_fits_in_line_number_section_complaint (void)
1202 complaint (&symfile_complaints
,
1203 _("statement list doesn't fit in .debug_line section"));
1207 dwarf2_debug_line_missing_file_complaint (void)
1209 complaint (&symfile_complaints
,
1210 _(".debug_line section has line data without a file"));
1214 dwarf2_debug_line_missing_end_sequence_complaint (void)
1216 complaint (&symfile_complaints
,
1217 _(".debug_line section has line "
1218 "program sequence without an end"));
1222 dwarf2_complex_location_expr_complaint (void)
1224 complaint (&symfile_complaints
, _("location expression too complex"));
1228 dwarf2_const_value_length_mismatch_complaint (const char *arg1
, int arg2
,
1231 complaint (&symfile_complaints
,
1232 _("const value length mismatch for '%s', got %d, expected %d"),
1237 dwarf2_section_buffer_overflow_complaint (struct dwarf2_section_info
*section
)
1239 complaint (&symfile_complaints
,
1240 _("debug info runs off end of %s section"
1242 section
->asection
->name
,
1243 bfd_get_filename (section
->asection
->owner
));
1247 dwarf2_macro_malformed_definition_complaint (const char *arg1
)
1249 complaint (&symfile_complaints
,
1250 _("macro debug info contains a "
1251 "malformed macro definition:\n`%s'"),
1256 dwarf2_invalid_attrib_class_complaint (const char *arg1
, const char *arg2
)
1258 complaint (&symfile_complaints
,
1259 _("invalid attribute class or form for '%s' in '%s'"),
1263 /* local function prototypes */
1265 static void dwarf2_locate_sections (bfd
*, asection
*, void *);
1267 static void dwarf2_create_include_psymtab (char *, struct partial_symtab
*,
1270 static void dwarf2_find_base_address (struct die_info
*die
,
1271 struct dwarf2_cu
*cu
);
1273 static void dwarf2_build_psymtabs_hard (struct objfile
*);
1275 static void scan_partial_symbols (struct partial_die_info
*,
1276 CORE_ADDR
*, CORE_ADDR
*,
1277 int, struct dwarf2_cu
*);
1279 static void add_partial_symbol (struct partial_die_info
*,
1280 struct dwarf2_cu
*);
1282 static void add_partial_namespace (struct partial_die_info
*pdi
,
1283 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
1284 int need_pc
, struct dwarf2_cu
*cu
);
1286 static void add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
1287 CORE_ADDR
*highpc
, int need_pc
,
1288 struct dwarf2_cu
*cu
);
1290 static void add_partial_enumeration (struct partial_die_info
*enum_pdi
,
1291 struct dwarf2_cu
*cu
);
1293 static void add_partial_subprogram (struct partial_die_info
*pdi
,
1294 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
1295 int need_pc
, struct dwarf2_cu
*cu
);
1297 static void dwarf2_read_symtab (struct partial_symtab
*,
1300 static void psymtab_to_symtab_1 (struct partial_symtab
*);
1302 static struct abbrev_info
*abbrev_table_lookup_abbrev
1303 (const struct abbrev_table
*, unsigned int);
1305 static struct abbrev_table
*abbrev_table_read_table
1306 (struct dwarf2_section_info
*, sect_offset
);
1308 static void abbrev_table_free (struct abbrev_table
*);
1310 static void abbrev_table_free_cleanup (void *);
1312 static void dwarf2_read_abbrevs (struct dwarf2_cu
*,
1313 struct dwarf2_section_info
*);
1315 static void dwarf2_free_abbrev_table (void *);
1317 static unsigned int peek_abbrev_code (bfd
*, gdb_byte
*);
1319 static struct partial_die_info
*load_partial_dies
1320 (const struct die_reader_specs
*, gdb_byte
*, int);
1322 static gdb_byte
*read_partial_die (const struct die_reader_specs
*,
1323 struct partial_die_info
*,
1324 struct abbrev_info
*,
1328 static struct partial_die_info
*find_partial_die (sect_offset
, int,
1329 struct dwarf2_cu
*);
1331 static void fixup_partial_die (struct partial_die_info
*,
1332 struct dwarf2_cu
*);
1334 static gdb_byte
*read_attribute (const struct die_reader_specs
*,
1335 struct attribute
*, struct attr_abbrev
*,
1338 static unsigned int read_1_byte (bfd
*, const gdb_byte
*);
1340 static int read_1_signed_byte (bfd
*, const gdb_byte
*);
1342 static unsigned int read_2_bytes (bfd
*, const gdb_byte
*);
1344 static unsigned int read_4_bytes (bfd
*, const gdb_byte
*);
1346 static ULONGEST
read_8_bytes (bfd
*, const gdb_byte
*);
1348 static CORE_ADDR
read_address (bfd
*, gdb_byte
*ptr
, struct dwarf2_cu
*,
1351 static LONGEST
read_initial_length (bfd
*, gdb_byte
*, unsigned int *);
1353 static LONGEST read_checked_initial_length_and_offset
1354 (bfd
*, gdb_byte
*, const struct comp_unit_head
*,
1355 unsigned int *, unsigned int *);
1357 static LONGEST
read_offset (bfd
*, gdb_byte
*, const struct comp_unit_head
*,
1360 static LONGEST
read_offset_1 (bfd
*, gdb_byte
*, unsigned int);
1362 static sect_offset
read_abbrev_offset (struct dwarf2_section_info
*,
1365 static gdb_byte
*read_n_bytes (bfd
*, gdb_byte
*, unsigned int);
1367 static char *read_direct_string (bfd
*, gdb_byte
*, unsigned int *);
1369 static char *read_indirect_string (bfd
*, gdb_byte
*,
1370 const struct comp_unit_head
*,
1373 static char *read_indirect_string_from_dwz (struct dwz_file
*, LONGEST
);
1375 static ULONGEST
read_unsigned_leb128 (bfd
*, gdb_byte
*, unsigned int *);
1377 static LONGEST
read_signed_leb128 (bfd
*, gdb_byte
*, unsigned int *);
1379 static CORE_ADDR
read_addr_index_from_leb128 (struct dwarf2_cu
*, gdb_byte
*,
1382 static char *read_str_index (const struct die_reader_specs
*reader
,
1383 struct dwarf2_cu
*cu
, ULONGEST str_index
);
1385 static void set_cu_language (unsigned int, struct dwarf2_cu
*);
1387 static struct attribute
*dwarf2_attr (struct die_info
*, unsigned int,
1388 struct dwarf2_cu
*);
1390 static struct attribute
*dwarf2_attr_no_follow (struct die_info
*,
1393 static int dwarf2_flag_true_p (struct die_info
*die
, unsigned name
,
1394 struct dwarf2_cu
*cu
);
1396 static int die_is_declaration (struct die_info
*, struct dwarf2_cu
*cu
);
1398 static struct die_info
*die_specification (struct die_info
*die
,
1399 struct dwarf2_cu
**);
1401 static void free_line_header (struct line_header
*lh
);
1403 static void add_file_name (struct line_header
*, char *, unsigned int,
1404 unsigned int, unsigned int);
1406 static struct line_header
*dwarf_decode_line_header (unsigned int offset
,
1407 struct dwarf2_cu
*cu
);
1409 static void dwarf_decode_lines (struct line_header
*, const char *,
1410 struct dwarf2_cu
*, struct partial_symtab
*,
1413 static void dwarf2_start_subfile (char *, const char *, const char *);
1415 static void dwarf2_start_symtab (struct dwarf2_cu
*,
1416 const char *, const char *, CORE_ADDR
);
1418 static struct symbol
*new_symbol (struct die_info
*, struct type
*,
1419 struct dwarf2_cu
*);
1421 static struct symbol
*new_symbol_full (struct die_info
*, struct type
*,
1422 struct dwarf2_cu
*, struct symbol
*);
1424 static void dwarf2_const_value (struct attribute
*, struct symbol
*,
1425 struct dwarf2_cu
*);
1427 static void dwarf2_const_value_attr (struct attribute
*attr
,
1430 struct obstack
*obstack
,
1431 struct dwarf2_cu
*cu
, LONGEST
*value
,
1433 struct dwarf2_locexpr_baton
**baton
);
1435 static struct type
*die_type (struct die_info
*, struct dwarf2_cu
*);
1437 static int need_gnat_info (struct dwarf2_cu
*);
1439 static struct type
*die_descriptive_type (struct die_info
*,
1440 struct dwarf2_cu
*);
1442 static void set_descriptive_type (struct type
*, struct die_info
*,
1443 struct dwarf2_cu
*);
1445 static struct type
*die_containing_type (struct die_info
*,
1446 struct dwarf2_cu
*);
1448 static struct type
*lookup_die_type (struct die_info
*, struct attribute
*,
1449 struct dwarf2_cu
*);
1451 static struct type
*read_type_die (struct die_info
*, struct dwarf2_cu
*);
1453 static struct type
*read_type_die_1 (struct die_info
*, struct dwarf2_cu
*);
1455 static const char *determine_prefix (struct die_info
*die
, struct dwarf2_cu
*);
1457 static char *typename_concat (struct obstack
*obs
, const char *prefix
,
1458 const char *suffix
, int physname
,
1459 struct dwarf2_cu
*cu
);
1461 static void read_file_scope (struct die_info
*, struct dwarf2_cu
*);
1463 static void read_type_unit_scope (struct die_info
*, struct dwarf2_cu
*);
1465 static void read_func_scope (struct die_info
*, struct dwarf2_cu
*);
1467 static void read_lexical_block_scope (struct die_info
*, struct dwarf2_cu
*);
1469 static void read_call_site_scope (struct die_info
*die
, struct dwarf2_cu
*cu
);
1471 static int dwarf2_ranges_read (unsigned, CORE_ADDR
*, CORE_ADDR
*,
1472 struct dwarf2_cu
*, struct partial_symtab
*);
1474 static int dwarf2_get_pc_bounds (struct die_info
*,
1475 CORE_ADDR
*, CORE_ADDR
*, struct dwarf2_cu
*,
1476 struct partial_symtab
*);
1478 static void get_scope_pc_bounds (struct die_info
*,
1479 CORE_ADDR
*, CORE_ADDR
*,
1480 struct dwarf2_cu
*);
1482 static void dwarf2_record_block_ranges (struct die_info
*, struct block
*,
1483 CORE_ADDR
, struct dwarf2_cu
*);
1485 static void dwarf2_add_field (struct field_info
*, struct die_info
*,
1486 struct dwarf2_cu
*);
1488 static void dwarf2_attach_fields_to_type (struct field_info
*,
1489 struct type
*, struct dwarf2_cu
*);
1491 static void dwarf2_add_member_fn (struct field_info
*,
1492 struct die_info
*, struct type
*,
1493 struct dwarf2_cu
*);
1495 static void dwarf2_attach_fn_fields_to_type (struct field_info
*,
1497 struct dwarf2_cu
*);
1499 static void process_structure_scope (struct die_info
*, struct dwarf2_cu
*);
1501 static void read_common_block (struct die_info
*, struct dwarf2_cu
*);
1503 static void read_namespace (struct die_info
*die
, struct dwarf2_cu
*);
1505 static void read_module (struct die_info
*die
, struct dwarf2_cu
*cu
);
1507 static void read_import_statement (struct die_info
*die
, struct dwarf2_cu
*);
1509 static struct type
*read_module_type (struct die_info
*die
,
1510 struct dwarf2_cu
*cu
);
1512 static const char *namespace_name (struct die_info
*die
,
1513 int *is_anonymous
, struct dwarf2_cu
*);
1515 static void process_enumeration_scope (struct die_info
*, struct dwarf2_cu
*);
1517 static CORE_ADDR
decode_locdesc (struct dwarf_block
*, struct dwarf2_cu
*);
1519 static enum dwarf_array_dim_ordering
read_array_order (struct die_info
*,
1520 struct dwarf2_cu
*);
1522 static struct die_info
*read_die_and_children (const struct die_reader_specs
*,
1524 gdb_byte
**new_info_ptr
,
1525 struct die_info
*parent
);
1527 static struct die_info
*read_die_and_siblings (const struct die_reader_specs
*,
1529 gdb_byte
**new_info_ptr
,
1530 struct die_info
*parent
);
1532 static gdb_byte
*read_full_die_1 (const struct die_reader_specs
*,
1533 struct die_info
**, gdb_byte
*, int *, int);
1535 static gdb_byte
*read_full_die (const struct die_reader_specs
*,
1536 struct die_info
**, gdb_byte
*, int *);
1538 static void process_die (struct die_info
*, struct dwarf2_cu
*);
1540 static const char *dwarf2_canonicalize_name (const char *, struct dwarf2_cu
*,
1543 static const char *dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*);
1545 static const char *dwarf2_full_name (const char *name
,
1546 struct die_info
*die
,
1547 struct dwarf2_cu
*cu
);
1549 static struct die_info
*dwarf2_extension (struct die_info
*die
,
1550 struct dwarf2_cu
**);
1552 static const char *dwarf_tag_name (unsigned int);
1554 static const char *dwarf_attr_name (unsigned int);
1556 static const char *dwarf_form_name (unsigned int);
1558 static char *dwarf_bool_name (unsigned int);
1560 static const char *dwarf_type_encoding_name (unsigned int);
1562 static struct die_info
*sibling_die (struct die_info
*);
1564 static void dump_die_shallow (struct ui_file
*, int indent
, struct die_info
*);
1566 static void dump_die_for_error (struct die_info
*);
1568 static void dump_die_1 (struct ui_file
*, int level
, int max_level
,
1571 /*static*/ void dump_die (struct die_info
*, int max_level
);
1573 static void store_in_ref_table (struct die_info
*,
1574 struct dwarf2_cu
*);
1576 static int is_ref_attr (struct attribute
*);
1578 static sect_offset
dwarf2_get_ref_die_offset (struct attribute
*);
1580 static LONGEST
dwarf2_get_attr_constant_value (struct attribute
*, int);
1582 static struct die_info
*follow_die_ref_or_sig (struct die_info
*,
1584 struct dwarf2_cu
**);
1586 static struct die_info
*follow_die_ref (struct die_info
*,
1588 struct dwarf2_cu
**);
1590 static struct die_info
*follow_die_sig (struct die_info
*,
1592 struct dwarf2_cu
**);
1594 static struct signatured_type
*lookup_signatured_type_at_offset
1595 (struct objfile
*objfile
,
1596 struct dwarf2_section_info
*section
, sect_offset offset
);
1598 static void load_full_type_unit (struct dwarf2_per_cu_data
*per_cu
);
1600 static void read_signatured_type (struct signatured_type
*);
1602 static struct type_unit_group
*get_type_unit_group
1603 (struct dwarf2_cu
*, struct attribute
*);
1605 static void build_type_unit_groups (die_reader_func_ftype
*, void *);
1607 /* memory allocation interface */
1609 static struct dwarf_block
*dwarf_alloc_block (struct dwarf2_cu
*);
1611 static struct die_info
*dwarf_alloc_die (struct dwarf2_cu
*, int);
1613 static void dwarf_decode_macros (struct dwarf2_cu
*, unsigned int,
1616 static int attr_form_is_block (struct attribute
*);
1618 static int attr_form_is_section_offset (struct attribute
*);
1620 static int attr_form_is_constant (struct attribute
*);
1622 static void fill_in_loclist_baton (struct dwarf2_cu
*cu
,
1623 struct dwarf2_loclist_baton
*baton
,
1624 struct attribute
*attr
);
1626 static void dwarf2_symbol_mark_computed (struct attribute
*attr
,
1628 struct dwarf2_cu
*cu
);
1630 static gdb_byte
*skip_one_die (const struct die_reader_specs
*reader
,
1632 struct abbrev_info
*abbrev
);
1634 static void free_stack_comp_unit (void *);
1636 static hashval_t
partial_die_hash (const void *item
);
1638 static int partial_die_eq (const void *item_lhs
, const void *item_rhs
);
1640 static struct dwarf2_per_cu_data
*dwarf2_find_containing_comp_unit
1641 (sect_offset offset
, unsigned int offset_in_dwz
, struct objfile
*objfile
);
1643 static void init_one_comp_unit (struct dwarf2_cu
*cu
,
1644 struct dwarf2_per_cu_data
*per_cu
);
1646 static void prepare_one_comp_unit (struct dwarf2_cu
*cu
,
1647 struct die_info
*comp_unit_die
,
1648 enum language pretend_language
);
1650 static void free_heap_comp_unit (void *);
1652 static void free_cached_comp_units (void *);
1654 static void age_cached_comp_units (void);
1656 static void free_one_cached_comp_unit (struct dwarf2_per_cu_data
*);
1658 static struct type
*set_die_type (struct die_info
*, struct type
*,
1659 struct dwarf2_cu
*);
1661 static void create_all_comp_units (struct objfile
*);
1663 static int create_all_type_units (struct objfile
*);
1665 static void load_full_comp_unit (struct dwarf2_per_cu_data
*,
1668 static void process_full_comp_unit (struct dwarf2_per_cu_data
*,
1671 static void process_full_type_unit (struct dwarf2_per_cu_data
*,
1674 static void dwarf2_add_dependence (struct dwarf2_cu
*,
1675 struct dwarf2_per_cu_data
*);
1677 static void dwarf2_mark (struct dwarf2_cu
*);
1679 static void dwarf2_clear_marks (struct dwarf2_per_cu_data
*);
1681 static struct type
*get_die_type_at_offset (sect_offset
,
1682 struct dwarf2_per_cu_data
*per_cu
);
1684 static struct type
*get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
);
1686 static void dwarf2_release_queue (void *dummy
);
1688 static void queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
1689 enum language pretend_language
);
1691 static int maybe_queue_comp_unit (struct dwarf2_cu
*this_cu
,
1692 struct dwarf2_per_cu_data
*per_cu
,
1693 enum language pretend_language
);
1695 static void process_queue (void);
1697 static void find_file_and_directory (struct die_info
*die
,
1698 struct dwarf2_cu
*cu
,
1699 const char **name
, const char **comp_dir
);
1701 static char *file_full_name (int file
, struct line_header
*lh
,
1702 const char *comp_dir
);
1704 static gdb_byte
*read_and_check_comp_unit_head
1705 (struct comp_unit_head
*header
,
1706 struct dwarf2_section_info
*section
,
1707 struct dwarf2_section_info
*abbrev_section
, gdb_byte
*info_ptr
,
1708 int is_debug_types_section
);
1710 static void init_cutu_and_read_dies
1711 (struct dwarf2_per_cu_data
*this_cu
, struct abbrev_table
*abbrev_table
,
1712 int use_existing_cu
, int keep
,
1713 die_reader_func_ftype
*die_reader_func
, void *data
);
1715 static void init_cutu_and_read_dies_simple
1716 (struct dwarf2_per_cu_data
*this_cu
,
1717 die_reader_func_ftype
*die_reader_func
, void *data
);
1719 static htab_t
allocate_signatured_type_table (struct objfile
*objfile
);
1721 static htab_t
allocate_dwo_unit_table (struct objfile
*objfile
);
1723 static struct dwo_unit
*lookup_dwo_comp_unit
1724 (struct dwarf2_per_cu_data
*, const char *, const char *, ULONGEST
);
1726 static struct dwo_unit
*lookup_dwo_type_unit
1727 (struct signatured_type
*, const char *, const char *);
1729 static void free_dwo_file_cleanup (void *);
1731 static void process_cu_includes (void);
1733 static void check_producer (struct dwarf2_cu
*cu
);
1737 /* Convert VALUE between big- and little-endian. */
1739 byte_swap (offset_type value
)
1743 result
= (value
& 0xff) << 24;
1744 result
|= (value
& 0xff00) << 8;
1745 result
|= (value
& 0xff0000) >> 8;
1746 result
|= (value
& 0xff000000) >> 24;
1750 #define MAYBE_SWAP(V) byte_swap (V)
1753 #define MAYBE_SWAP(V) (V)
1754 #endif /* WORDS_BIGENDIAN */
1756 /* The suffix for an index file. */
1757 #define INDEX_SUFFIX ".gdb-index"
1759 static const char *dwarf2_physname (const char *name
, struct die_info
*die
,
1760 struct dwarf2_cu
*cu
);
1762 /* Try to locate the sections we need for DWARF 2 debugging
1763 information and return true if we have enough to do something.
1764 NAMES points to the dwarf2 section names, or is NULL if the standard
1765 ELF names are used. */
1768 dwarf2_has_info (struct objfile
*objfile
,
1769 const struct dwarf2_debug_sections
*names
)
1771 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
1772 if (!dwarf2_per_objfile
)
1774 /* Initialize per-objfile state. */
1775 struct dwarf2_per_objfile
*data
1776 = obstack_alloc (&objfile
->objfile_obstack
, sizeof (*data
));
1778 memset (data
, 0, sizeof (*data
));
1779 set_objfile_data (objfile
, dwarf2_objfile_data_key
, data
);
1780 dwarf2_per_objfile
= data
;
1782 bfd_map_over_sections (objfile
->obfd
, dwarf2_locate_sections
,
1784 dwarf2_per_objfile
->objfile
= objfile
;
1786 return (dwarf2_per_objfile
->info
.asection
!= NULL
1787 && dwarf2_per_objfile
->abbrev
.asection
!= NULL
);
1790 /* When loading sections, we look either for uncompressed section or for
1791 compressed section names. */
1794 section_is_p (const char *section_name
,
1795 const struct dwarf2_section_names
*names
)
1797 if (names
->normal
!= NULL
1798 && strcmp (section_name
, names
->normal
) == 0)
1800 if (names
->compressed
!= NULL
1801 && strcmp (section_name
, names
->compressed
) == 0)
1806 /* This function is mapped across the sections and remembers the
1807 offset and size of each of the debugging sections we are interested
1811 dwarf2_locate_sections (bfd
*abfd
, asection
*sectp
, void *vnames
)
1813 const struct dwarf2_debug_sections
*names
;
1814 flagword aflag
= bfd_get_section_flags (abfd
, sectp
);
1817 names
= &dwarf2_elf_names
;
1819 names
= (const struct dwarf2_debug_sections
*) vnames
;
1821 if ((aflag
& SEC_HAS_CONTENTS
) == 0)
1824 else if (section_is_p (sectp
->name
, &names
->info
))
1826 dwarf2_per_objfile
->info
.asection
= sectp
;
1827 dwarf2_per_objfile
->info
.size
= bfd_get_section_size (sectp
);
1829 else if (section_is_p (sectp
->name
, &names
->abbrev
))
1831 dwarf2_per_objfile
->abbrev
.asection
= sectp
;
1832 dwarf2_per_objfile
->abbrev
.size
= bfd_get_section_size (sectp
);
1834 else if (section_is_p (sectp
->name
, &names
->line
))
1836 dwarf2_per_objfile
->line
.asection
= sectp
;
1837 dwarf2_per_objfile
->line
.size
= bfd_get_section_size (sectp
);
1839 else if (section_is_p (sectp
->name
, &names
->loc
))
1841 dwarf2_per_objfile
->loc
.asection
= sectp
;
1842 dwarf2_per_objfile
->loc
.size
= bfd_get_section_size (sectp
);
1844 else if (section_is_p (sectp
->name
, &names
->macinfo
))
1846 dwarf2_per_objfile
->macinfo
.asection
= sectp
;
1847 dwarf2_per_objfile
->macinfo
.size
= bfd_get_section_size (sectp
);
1849 else if (section_is_p (sectp
->name
, &names
->macro
))
1851 dwarf2_per_objfile
->macro
.asection
= sectp
;
1852 dwarf2_per_objfile
->macro
.size
= bfd_get_section_size (sectp
);
1854 else if (section_is_p (sectp
->name
, &names
->str
))
1856 dwarf2_per_objfile
->str
.asection
= sectp
;
1857 dwarf2_per_objfile
->str
.size
= bfd_get_section_size (sectp
);
1859 else if (section_is_p (sectp
->name
, &names
->addr
))
1861 dwarf2_per_objfile
->addr
.asection
= sectp
;
1862 dwarf2_per_objfile
->addr
.size
= bfd_get_section_size (sectp
);
1864 else if (section_is_p (sectp
->name
, &names
->frame
))
1866 dwarf2_per_objfile
->frame
.asection
= sectp
;
1867 dwarf2_per_objfile
->frame
.size
= bfd_get_section_size (sectp
);
1869 else if (section_is_p (sectp
->name
, &names
->eh_frame
))
1871 dwarf2_per_objfile
->eh_frame
.asection
= sectp
;
1872 dwarf2_per_objfile
->eh_frame
.size
= bfd_get_section_size (sectp
);
1874 else if (section_is_p (sectp
->name
, &names
->ranges
))
1876 dwarf2_per_objfile
->ranges
.asection
= sectp
;
1877 dwarf2_per_objfile
->ranges
.size
= bfd_get_section_size (sectp
);
1879 else if (section_is_p (sectp
->name
, &names
->types
))
1881 struct dwarf2_section_info type_section
;
1883 memset (&type_section
, 0, sizeof (type_section
));
1884 type_section
.asection
= sectp
;
1885 type_section
.size
= bfd_get_section_size (sectp
);
1887 VEC_safe_push (dwarf2_section_info_def
, dwarf2_per_objfile
->types
,
1890 else if (section_is_p (sectp
->name
, &names
->gdb_index
))
1892 dwarf2_per_objfile
->gdb_index
.asection
= sectp
;
1893 dwarf2_per_objfile
->gdb_index
.size
= bfd_get_section_size (sectp
);
1896 if ((bfd_get_section_flags (abfd
, sectp
) & SEC_LOAD
)
1897 && bfd_section_vma (abfd
, sectp
) == 0)
1898 dwarf2_per_objfile
->has_section_at_zero
= 1;
1901 /* A helper function that decides whether a section is empty,
1905 dwarf2_section_empty_p (struct dwarf2_section_info
*info
)
1907 return info
->asection
== NULL
|| info
->size
== 0;
1910 /* Read the contents of the section INFO.
1911 OBJFILE is the main object file, but not necessarily the file where
1912 the section comes from. E.g., for DWO files INFO->asection->owner
1913 is the bfd of the DWO file.
1914 If the section is compressed, uncompress it before returning. */
1917 dwarf2_read_section (struct objfile
*objfile
, struct dwarf2_section_info
*info
)
1919 asection
*sectp
= info
->asection
;
1921 gdb_byte
*buf
, *retbuf
;
1922 unsigned char header
[4];
1926 info
->buffer
= NULL
;
1929 if (dwarf2_section_empty_p (info
))
1932 abfd
= sectp
->owner
;
1934 /* If the section has relocations, we must read it ourselves.
1935 Otherwise we attach it to the BFD. */
1936 if ((sectp
->flags
& SEC_RELOC
) == 0)
1938 const gdb_byte
*bytes
= gdb_bfd_map_section (sectp
, &info
->size
);
1940 /* We have to cast away const here for historical reasons.
1941 Fixing dwarf2read to be const-correct would be quite nice. */
1942 info
->buffer
= (gdb_byte
*) bytes
;
1946 buf
= obstack_alloc (&objfile
->objfile_obstack
, info
->size
);
1949 /* When debugging .o files, we may need to apply relocations; see
1950 http://sourceware.org/ml/gdb-patches/2002-04/msg00136.html .
1951 We never compress sections in .o files, so we only need to
1952 try this when the section is not compressed. */
1953 retbuf
= symfile_relocate_debug_section (objfile
, sectp
, buf
);
1956 info
->buffer
= retbuf
;
1960 if (bfd_seek (abfd
, sectp
->filepos
, SEEK_SET
) != 0
1961 || bfd_bread (buf
, info
->size
, abfd
) != info
->size
)
1962 error (_("Dwarf Error: Can't read DWARF data from '%s'"),
1963 bfd_get_filename (abfd
));
1966 /* A helper function that returns the size of a section in a safe way.
1967 If you are positive that the section has been read before using the
1968 size, then it is safe to refer to the dwarf2_section_info object's
1969 "size" field directly. In other cases, you must call this
1970 function, because for compressed sections the size field is not set
1971 correctly until the section has been read. */
1973 static bfd_size_type
1974 dwarf2_section_size (struct objfile
*objfile
,
1975 struct dwarf2_section_info
*info
)
1978 dwarf2_read_section (objfile
, info
);
1982 /* Fill in SECTP, BUFP and SIZEP with section info, given OBJFILE and
1986 dwarf2_get_section_info (struct objfile
*objfile
,
1987 enum dwarf2_section_enum sect
,
1988 asection
**sectp
, gdb_byte
**bufp
,
1989 bfd_size_type
*sizep
)
1991 struct dwarf2_per_objfile
*data
1992 = objfile_data (objfile
, dwarf2_objfile_data_key
);
1993 struct dwarf2_section_info
*info
;
1995 /* We may see an objfile without any DWARF, in which case we just
2006 case DWARF2_DEBUG_FRAME
:
2007 info
= &data
->frame
;
2009 case DWARF2_EH_FRAME
:
2010 info
= &data
->eh_frame
;
2013 gdb_assert_not_reached ("unexpected section");
2016 dwarf2_read_section (objfile
, info
);
2018 *sectp
= info
->asection
;
2019 *bufp
= info
->buffer
;
2020 *sizep
= info
->size
;
2023 /* A helper function to find the sections for a .dwz file. */
2026 locate_dwz_sections (bfd
*abfd
, asection
*sectp
, void *arg
)
2028 struct dwz_file
*dwz_file
= arg
;
2030 /* Note that we only support the standard ELF names, because .dwz
2031 is ELF-only (at the time of writing). */
2032 if (section_is_p (sectp
->name
, &dwarf2_elf_names
.abbrev
))
2034 dwz_file
->abbrev
.asection
= sectp
;
2035 dwz_file
->abbrev
.size
= bfd_get_section_size (sectp
);
2037 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.info
))
2039 dwz_file
->info
.asection
= sectp
;
2040 dwz_file
->info
.size
= bfd_get_section_size (sectp
);
2042 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.str
))
2044 dwz_file
->str
.asection
= sectp
;
2045 dwz_file
->str
.size
= bfd_get_section_size (sectp
);
2047 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.line
))
2049 dwz_file
->line
.asection
= sectp
;
2050 dwz_file
->line
.size
= bfd_get_section_size (sectp
);
2052 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.macro
))
2054 dwz_file
->macro
.asection
= sectp
;
2055 dwz_file
->macro
.size
= bfd_get_section_size (sectp
);
2057 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.gdb_index
))
2059 dwz_file
->gdb_index
.asection
= sectp
;
2060 dwz_file
->gdb_index
.size
= bfd_get_section_size (sectp
);
2064 /* Open the separate '.dwz' debug file, if needed. Error if the file
2067 static struct dwz_file
*
2068 dwarf2_get_dwz_file (void)
2070 bfd
*abfd
, *dwz_bfd
;
2073 struct cleanup
*cleanup
;
2074 const char *filename
;
2075 struct dwz_file
*result
;
2077 if (dwarf2_per_objfile
->dwz_file
!= NULL
)
2078 return dwarf2_per_objfile
->dwz_file
;
2080 abfd
= dwarf2_per_objfile
->objfile
->obfd
;
2081 section
= bfd_get_section_by_name (abfd
, ".gnu_debugaltlink");
2082 if (section
== NULL
)
2083 error (_("could not find '.gnu_debugaltlink' section"));
2084 if (!bfd_malloc_and_get_section (abfd
, section
, &data
))
2085 error (_("could not read '.gnu_debugaltlink' section: %s"),
2086 bfd_errmsg (bfd_get_error ()));
2087 cleanup
= make_cleanup (xfree
, data
);
2090 if (!IS_ABSOLUTE_PATH (filename
))
2092 char *abs
= gdb_realpath (dwarf2_per_objfile
->objfile
->name
);
2095 make_cleanup (xfree
, abs
);
2096 abs
= ldirname (abs
);
2097 make_cleanup (xfree
, abs
);
2099 rel
= concat (abs
, SLASH_STRING
, filename
, (char *) NULL
);
2100 make_cleanup (xfree
, rel
);
2104 /* The format is just a NUL-terminated file name, followed by the
2105 build-id. For now, though, we ignore the build-id. */
2106 dwz_bfd
= gdb_bfd_open (filename
, gnutarget
, -1);
2107 if (dwz_bfd
== NULL
)
2108 error (_("could not read '%s': %s"), filename
,
2109 bfd_errmsg (bfd_get_error ()));
2111 if (!bfd_check_format (dwz_bfd
, bfd_object
))
2113 gdb_bfd_unref (dwz_bfd
);
2114 error (_("file '%s' was not usable: %s"), filename
,
2115 bfd_errmsg (bfd_get_error ()));
2118 result
= OBSTACK_ZALLOC (&dwarf2_per_objfile
->objfile
->objfile_obstack
,
2120 result
->dwz_bfd
= dwz_bfd
;
2122 bfd_map_over_sections (dwz_bfd
, locate_dwz_sections
, result
);
2124 do_cleanups (cleanup
);
2126 dwarf2_per_objfile
->dwz_file
= result
;
2130 /* DWARF quick_symbols_functions support. */
2132 /* TUs can share .debug_line entries, and there can be a lot more TUs than
2133 unique line tables, so we maintain a separate table of all .debug_line
2134 derived entries to support the sharing.
2135 All the quick functions need is the list of file names. We discard the
2136 line_header when we're done and don't need to record it here. */
2137 struct quick_file_names
2139 /* The data used to construct the hash key. */
2140 struct stmt_list_hash hash
;
2142 /* The number of entries in file_names, real_names. */
2143 unsigned int num_file_names
;
2145 /* The file names from the line table, after being run through
2147 const char **file_names
;
2149 /* The file names from the line table after being run through
2150 gdb_realpath. These are computed lazily. */
2151 const char **real_names
;
2154 /* When using the index (and thus not using psymtabs), each CU has an
2155 object of this type. This is used to hold information needed by
2156 the various "quick" methods. */
2157 struct dwarf2_per_cu_quick_data
2159 /* The file table. This can be NULL if there was no file table
2160 or it's currently not read in.
2161 NOTE: This points into dwarf2_per_objfile->quick_file_names_table. */
2162 struct quick_file_names
*file_names
;
2164 /* The corresponding symbol table. This is NULL if symbols for this
2165 CU have not yet been read. */
2166 struct symtab
*symtab
;
2168 /* A temporary mark bit used when iterating over all CUs in
2169 expand_symtabs_matching. */
2170 unsigned int mark
: 1;
2172 /* True if we've tried to read the file table and found there isn't one.
2173 There will be no point in trying to read it again next time. */
2174 unsigned int no_file_data
: 1;
2177 /* Utility hash function for a stmt_list_hash. */
2180 hash_stmt_list_entry (const struct stmt_list_hash
*stmt_list_hash
)
2184 if (stmt_list_hash
->dwo_unit
!= NULL
)
2185 v
+= (uintptr_t) stmt_list_hash
->dwo_unit
->dwo_file
;
2186 v
+= stmt_list_hash
->line_offset
.sect_off
;
2190 /* Utility equality function for a stmt_list_hash. */
2193 eq_stmt_list_entry (const struct stmt_list_hash
*lhs
,
2194 const struct stmt_list_hash
*rhs
)
2196 if ((lhs
->dwo_unit
!= NULL
) != (rhs
->dwo_unit
!= NULL
))
2198 if (lhs
->dwo_unit
!= NULL
2199 && lhs
->dwo_unit
->dwo_file
!= rhs
->dwo_unit
->dwo_file
)
2202 return lhs
->line_offset
.sect_off
== rhs
->line_offset
.sect_off
;
2205 /* Hash function for a quick_file_names. */
2208 hash_file_name_entry (const void *e
)
2210 const struct quick_file_names
*file_data
= e
;
2212 return hash_stmt_list_entry (&file_data
->hash
);
2215 /* Equality function for a quick_file_names. */
2218 eq_file_name_entry (const void *a
, const void *b
)
2220 const struct quick_file_names
*ea
= a
;
2221 const struct quick_file_names
*eb
= b
;
2223 return eq_stmt_list_entry (&ea
->hash
, &eb
->hash
);
2226 /* Delete function for a quick_file_names. */
2229 delete_file_name_entry (void *e
)
2231 struct quick_file_names
*file_data
= e
;
2234 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
2236 xfree ((void*) file_data
->file_names
[i
]);
2237 if (file_data
->real_names
)
2238 xfree ((void*) file_data
->real_names
[i
]);
2241 /* The space for the struct itself lives on objfile_obstack,
2242 so we don't free it here. */
2245 /* Create a quick_file_names hash table. */
2248 create_quick_file_names_table (unsigned int nr_initial_entries
)
2250 return htab_create_alloc (nr_initial_entries
,
2251 hash_file_name_entry
, eq_file_name_entry
,
2252 delete_file_name_entry
, xcalloc
, xfree
);
2255 /* Read in PER_CU->CU. This function is unrelated to symtabs, symtab would
2256 have to be created afterwards. You should call age_cached_comp_units after
2257 processing PER_CU->CU. dw2_setup must have been already called. */
2260 load_cu (struct dwarf2_per_cu_data
*per_cu
)
2262 if (per_cu
->is_debug_types
)
2263 load_full_type_unit (per_cu
);
2265 load_full_comp_unit (per_cu
, language_minimal
);
2267 gdb_assert (per_cu
->cu
!= NULL
);
2269 dwarf2_find_base_address (per_cu
->cu
->dies
, per_cu
->cu
);
2272 /* Read in the symbols for PER_CU. */
2275 dw2_do_instantiate_symtab (struct dwarf2_per_cu_data
*per_cu
)
2277 struct cleanup
*back_to
;
2279 /* Skip type_unit_groups, reading the type units they contain
2280 is handled elsewhere. */
2281 if (IS_TYPE_UNIT_GROUP (per_cu
))
2284 back_to
= make_cleanup (dwarf2_release_queue
, NULL
);
2286 if (dwarf2_per_objfile
->using_index
2287 ? per_cu
->v
.quick
->symtab
== NULL
2288 : (per_cu
->v
.psymtab
== NULL
|| !per_cu
->v
.psymtab
->readin
))
2290 queue_comp_unit (per_cu
, language_minimal
);
2296 /* Age the cache, releasing compilation units that have not
2297 been used recently. */
2298 age_cached_comp_units ();
2300 do_cleanups (back_to
);
2303 /* Ensure that the symbols for PER_CU have been read in. OBJFILE is
2304 the objfile from which this CU came. Returns the resulting symbol
2307 static struct symtab
*
2308 dw2_instantiate_symtab (struct dwarf2_per_cu_data
*per_cu
)
2310 gdb_assert (dwarf2_per_objfile
->using_index
);
2311 if (!per_cu
->v
.quick
->symtab
)
2313 struct cleanup
*back_to
= make_cleanup (free_cached_comp_units
, NULL
);
2314 increment_reading_symtab ();
2315 dw2_do_instantiate_symtab (per_cu
);
2316 process_cu_includes ();
2317 do_cleanups (back_to
);
2319 return per_cu
->v
.quick
->symtab
;
2322 /* Return the CU given its index.
2324 This is intended for loops like:
2326 for (i = 0; i < (dwarf2_per_objfile->n_comp_units
2327 + dwarf2_per_objfile->n_type_units); ++i)
2329 struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i);
2335 static struct dwarf2_per_cu_data
*
2336 dw2_get_cu (int index
)
2338 if (index
>= dwarf2_per_objfile
->n_comp_units
)
2340 index
-= dwarf2_per_objfile
->n_comp_units
;
2341 gdb_assert (index
< dwarf2_per_objfile
->n_type_units
);
2342 return &dwarf2_per_objfile
->all_type_units
[index
]->per_cu
;
2345 return dwarf2_per_objfile
->all_comp_units
[index
];
2348 /* Return the primary CU given its index.
2349 The difference between this function and dw2_get_cu is in the handling
2350 of type units (TUs). Here we return the type_unit_group object.
2352 This is intended for loops like:
2354 for (i = 0; i < (dwarf2_per_objfile->n_comp_units
2355 + dwarf2_per_objfile->n_type_unit_groups); ++i)
2357 struct dwarf2_per_cu_data *per_cu = dw2_get_primary_cu (i);
2363 static struct dwarf2_per_cu_data
*
2364 dw2_get_primary_cu (int index
)
2366 if (index
>= dwarf2_per_objfile
->n_comp_units
)
2368 index
-= dwarf2_per_objfile
->n_comp_units
;
2369 gdb_assert (index
< dwarf2_per_objfile
->n_type_unit_groups
);
2370 return &dwarf2_per_objfile
->all_type_unit_groups
[index
]->per_cu
;
2373 return dwarf2_per_objfile
->all_comp_units
[index
];
2376 /* A helper for create_cus_from_index that handles a given list of
2380 create_cus_from_index_list (struct objfile
*objfile
,
2381 const gdb_byte
*cu_list
, offset_type n_elements
,
2382 struct dwarf2_section_info
*section
,
2388 for (i
= 0; i
< n_elements
; i
+= 2)
2390 struct dwarf2_per_cu_data
*the_cu
;
2391 ULONGEST offset
, length
;
2393 gdb_static_assert (sizeof (ULONGEST
) >= 8);
2394 offset
= extract_unsigned_integer (cu_list
, 8, BFD_ENDIAN_LITTLE
);
2395 length
= extract_unsigned_integer (cu_list
+ 8, 8, BFD_ENDIAN_LITTLE
);
2398 the_cu
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2399 struct dwarf2_per_cu_data
);
2400 the_cu
->offset
.sect_off
= offset
;
2401 the_cu
->length
= length
;
2402 the_cu
->objfile
= objfile
;
2403 the_cu
->info_or_types_section
= section
;
2404 the_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2405 struct dwarf2_per_cu_quick_data
);
2406 the_cu
->is_dwz
= is_dwz
;
2407 dwarf2_per_objfile
->all_comp_units
[base_offset
+ i
/ 2] = the_cu
;
2411 /* Read the CU list from the mapped index, and use it to create all
2412 the CU objects for this objfile. */
2415 create_cus_from_index (struct objfile
*objfile
,
2416 const gdb_byte
*cu_list
, offset_type cu_list_elements
,
2417 const gdb_byte
*dwz_list
, offset_type dwz_elements
)
2419 struct dwz_file
*dwz
;
2421 dwarf2_per_objfile
->n_comp_units
= (cu_list_elements
+ dwz_elements
) / 2;
2422 dwarf2_per_objfile
->all_comp_units
2423 = obstack_alloc (&objfile
->objfile_obstack
,
2424 dwarf2_per_objfile
->n_comp_units
2425 * sizeof (struct dwarf2_per_cu_data
*));
2427 create_cus_from_index_list (objfile
, cu_list
, cu_list_elements
,
2428 &dwarf2_per_objfile
->info
, 0, 0);
2430 if (dwz_elements
== 0)
2433 dwz
= dwarf2_get_dwz_file ();
2434 create_cus_from_index_list (objfile
, dwz_list
, dwz_elements
, &dwz
->info
, 1,
2435 cu_list_elements
/ 2);
2438 /* Create the signatured type hash table from the index. */
2441 create_signatured_type_table_from_index (struct objfile
*objfile
,
2442 struct dwarf2_section_info
*section
,
2443 const gdb_byte
*bytes
,
2444 offset_type elements
)
2447 htab_t sig_types_hash
;
2449 dwarf2_per_objfile
->n_type_units
= elements
/ 3;
2450 dwarf2_per_objfile
->all_type_units
2451 = obstack_alloc (&objfile
->objfile_obstack
,
2452 dwarf2_per_objfile
->n_type_units
2453 * sizeof (struct signatured_type
*));
2455 sig_types_hash
= allocate_signatured_type_table (objfile
);
2457 for (i
= 0; i
< elements
; i
+= 3)
2459 struct signatured_type
*sig_type
;
2460 ULONGEST offset
, type_offset_in_tu
, signature
;
2463 gdb_static_assert (sizeof (ULONGEST
) >= 8);
2464 offset
= extract_unsigned_integer (bytes
, 8, BFD_ENDIAN_LITTLE
);
2465 type_offset_in_tu
= extract_unsigned_integer (bytes
+ 8, 8,
2467 signature
= extract_unsigned_integer (bytes
+ 16, 8, BFD_ENDIAN_LITTLE
);
2470 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2471 struct signatured_type
);
2472 sig_type
->signature
= signature
;
2473 sig_type
->type_offset_in_tu
.cu_off
= type_offset_in_tu
;
2474 sig_type
->per_cu
.is_debug_types
= 1;
2475 sig_type
->per_cu
.info_or_types_section
= section
;
2476 sig_type
->per_cu
.offset
.sect_off
= offset
;
2477 sig_type
->per_cu
.objfile
= objfile
;
2478 sig_type
->per_cu
.v
.quick
2479 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2480 struct dwarf2_per_cu_quick_data
);
2482 slot
= htab_find_slot (sig_types_hash
, sig_type
, INSERT
);
2485 dwarf2_per_objfile
->all_type_units
[i
/ 3] = sig_type
;
2488 dwarf2_per_objfile
->signatured_types
= sig_types_hash
;
2491 /* Read the address map data from the mapped index, and use it to
2492 populate the objfile's psymtabs_addrmap. */
2495 create_addrmap_from_index (struct objfile
*objfile
, struct mapped_index
*index
)
2497 const gdb_byte
*iter
, *end
;
2498 struct obstack temp_obstack
;
2499 struct addrmap
*mutable_map
;
2500 struct cleanup
*cleanup
;
2503 obstack_init (&temp_obstack
);
2504 cleanup
= make_cleanup_obstack_free (&temp_obstack
);
2505 mutable_map
= addrmap_create_mutable (&temp_obstack
);
2507 iter
= index
->address_table
;
2508 end
= iter
+ index
->address_table_size
;
2510 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
2514 ULONGEST hi
, lo
, cu_index
;
2515 lo
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
2517 hi
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
2519 cu_index
= extract_unsigned_integer (iter
, 4, BFD_ENDIAN_LITTLE
);
2522 addrmap_set_empty (mutable_map
, lo
+ baseaddr
, hi
+ baseaddr
- 1,
2523 dw2_get_cu (cu_index
));
2526 objfile
->psymtabs_addrmap
= addrmap_create_fixed (mutable_map
,
2527 &objfile
->objfile_obstack
);
2528 do_cleanups (cleanup
);
2531 /* The hash function for strings in the mapped index. This is the same as
2532 SYMBOL_HASH_NEXT, but we keep a separate copy to maintain control over the
2533 implementation. This is necessary because the hash function is tied to the
2534 format of the mapped index file. The hash values do not have to match with
2537 Use INT_MAX for INDEX_VERSION if you generate the current index format. */
2540 mapped_index_string_hash (int index_version
, const void *p
)
2542 const unsigned char *str
= (const unsigned char *) p
;
2546 while ((c
= *str
++) != 0)
2548 if (index_version
>= 5)
2550 r
= r
* 67 + c
- 113;
2556 /* Find a slot in the mapped index INDEX for the object named NAME.
2557 If NAME is found, set *VEC_OUT to point to the CU vector in the
2558 constant pool and return 1. If NAME cannot be found, return 0. */
2561 find_slot_in_mapped_hash (struct mapped_index
*index
, const char *name
,
2562 offset_type
**vec_out
)
2564 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
2566 offset_type slot
, step
;
2567 int (*cmp
) (const char *, const char *);
2569 if (current_language
->la_language
== language_cplus
2570 || current_language
->la_language
== language_java
2571 || current_language
->la_language
== language_fortran
)
2573 /* NAME is already canonical. Drop any qualifiers as .gdb_index does
2575 const char *paren
= strchr (name
, '(');
2581 dup
= xmalloc (paren
- name
+ 1);
2582 memcpy (dup
, name
, paren
- name
);
2583 dup
[paren
- name
] = 0;
2585 make_cleanup (xfree
, dup
);
2590 /* Index version 4 did not support case insensitive searches. But the
2591 indices for case insensitive languages are built in lowercase, therefore
2592 simulate our NAME being searched is also lowercased. */
2593 hash
= mapped_index_string_hash ((index
->version
== 4
2594 && case_sensitivity
== case_sensitive_off
2595 ? 5 : index
->version
),
2598 slot
= hash
& (index
->symbol_table_slots
- 1);
2599 step
= ((hash
* 17) & (index
->symbol_table_slots
- 1)) | 1;
2600 cmp
= (case_sensitivity
== case_sensitive_on
? strcmp
: strcasecmp
);
2604 /* Convert a slot number to an offset into the table. */
2605 offset_type i
= 2 * slot
;
2607 if (index
->symbol_table
[i
] == 0 && index
->symbol_table
[i
+ 1] == 0)
2609 do_cleanups (back_to
);
2613 str
= index
->constant_pool
+ MAYBE_SWAP (index
->symbol_table
[i
]);
2614 if (!cmp (name
, str
))
2616 *vec_out
= (offset_type
*) (index
->constant_pool
2617 + MAYBE_SWAP (index
->symbol_table
[i
+ 1]));
2618 do_cleanups (back_to
);
2622 slot
= (slot
+ step
) & (index
->symbol_table_slots
- 1);
2626 /* A helper function that reads the .gdb_index from SECTION and fills
2627 in MAP. FILENAME is the name of the file containing the section;
2628 it is used for error reporting. DEPRECATED_OK is nonzero if it is
2629 ok to use deprecated sections.
2631 CU_LIST, CU_LIST_ELEMENTS, TYPES_LIST, and TYPES_LIST_ELEMENTS are
2632 out parameters that are filled in with information about the CU and
2633 TU lists in the section.
2635 Returns 1 if all went well, 0 otherwise. */
2638 read_index_from_section (struct objfile
*objfile
,
2639 const char *filename
,
2641 struct dwarf2_section_info
*section
,
2642 struct mapped_index
*map
,
2643 const gdb_byte
**cu_list
,
2644 offset_type
*cu_list_elements
,
2645 const gdb_byte
**types_list
,
2646 offset_type
*types_list_elements
)
2649 offset_type version
;
2650 offset_type
*metadata
;
2653 if (dwarf2_section_empty_p (section
))
2656 /* Older elfutils strip versions could keep the section in the main
2657 executable while splitting it for the separate debug info file. */
2658 if ((bfd_get_file_flags (section
->asection
) & SEC_HAS_CONTENTS
) == 0)
2661 dwarf2_read_section (objfile
, section
);
2663 addr
= section
->buffer
;
2664 /* Version check. */
2665 version
= MAYBE_SWAP (*(offset_type
*) addr
);
2666 /* Versions earlier than 3 emitted every copy of a psymbol. This
2667 causes the index to behave very poorly for certain requests. Version 3
2668 contained incomplete addrmap. So, it seems better to just ignore such
2672 static int warning_printed
= 0;
2673 if (!warning_printed
)
2675 warning (_("Skipping obsolete .gdb_index section in %s."),
2677 warning_printed
= 1;
2681 /* Index version 4 uses a different hash function than index version
2684 Versions earlier than 6 did not emit psymbols for inlined
2685 functions. Using these files will cause GDB not to be able to
2686 set breakpoints on inlined functions by name, so we ignore these
2687 indices unless the user has done
2688 "set use-deprecated-index-sections on". */
2689 if (version
< 6 && !deprecated_ok
)
2691 static int warning_printed
= 0;
2692 if (!warning_printed
)
2695 Skipping deprecated .gdb_index section in %s.\n\
2696 Do \"set use-deprecated-index-sections on\" before the file is read\n\
2697 to use the section anyway."),
2699 warning_printed
= 1;
2703 /* Version 7 indices generated by gold refer to the CU for a symbol instead
2704 of the TU (for symbols coming from TUs). It's just a performance bug, and
2705 we can't distinguish gdb-generated indices from gold-generated ones, so
2706 nothing to do here. */
2708 /* Indexes with higher version than the one supported by GDB may be no
2709 longer backward compatible. */
2713 map
->version
= version
;
2714 map
->total_size
= section
->size
;
2716 metadata
= (offset_type
*) (addr
+ sizeof (offset_type
));
2719 *cu_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
2720 *cu_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1]) - MAYBE_SWAP (metadata
[i
]))
2724 *types_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
2725 *types_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1])
2726 - MAYBE_SWAP (metadata
[i
]))
2730 map
->address_table
= addr
+ MAYBE_SWAP (metadata
[i
]);
2731 map
->address_table_size
= (MAYBE_SWAP (metadata
[i
+ 1])
2732 - MAYBE_SWAP (metadata
[i
]));
2735 map
->symbol_table
= (offset_type
*) (addr
+ MAYBE_SWAP (metadata
[i
]));
2736 map
->symbol_table_slots
= ((MAYBE_SWAP (metadata
[i
+ 1])
2737 - MAYBE_SWAP (metadata
[i
]))
2738 / (2 * sizeof (offset_type
)));
2741 map
->constant_pool
= addr
+ MAYBE_SWAP (metadata
[i
]);
2747 /* Read the index file. If everything went ok, initialize the "quick"
2748 elements of all the CUs and return 1. Otherwise, return 0. */
2751 dwarf2_read_index (struct objfile
*objfile
)
2753 struct mapped_index local_map
, *map
;
2754 const gdb_byte
*cu_list
, *types_list
, *dwz_list
= NULL
;
2755 offset_type cu_list_elements
, types_list_elements
, dwz_list_elements
= 0;
2757 if (!read_index_from_section (objfile
, objfile
->name
,
2758 use_deprecated_index_sections
,
2759 &dwarf2_per_objfile
->gdb_index
, &local_map
,
2760 &cu_list
, &cu_list_elements
,
2761 &types_list
, &types_list_elements
))
2764 /* Don't use the index if it's empty. */
2765 if (local_map
.symbol_table_slots
== 0)
2768 /* If there is a .dwz file, read it so we can get its CU list as
2770 if (bfd_get_section_by_name (objfile
->obfd
, ".gnu_debugaltlink") != NULL
)
2772 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
2773 struct mapped_index dwz_map
;
2774 const gdb_byte
*dwz_types_ignore
;
2775 offset_type dwz_types_elements_ignore
;
2777 if (!read_index_from_section (objfile
, bfd_get_filename (dwz
->dwz_bfd
),
2779 &dwz
->gdb_index
, &dwz_map
,
2780 &dwz_list
, &dwz_list_elements
,
2782 &dwz_types_elements_ignore
))
2784 warning (_("could not read '.gdb_index' section from %s; skipping"),
2785 bfd_get_filename (dwz
->dwz_bfd
));
2790 create_cus_from_index (objfile
, cu_list
, cu_list_elements
, dwz_list
,
2793 if (types_list_elements
)
2795 struct dwarf2_section_info
*section
;
2797 /* We can only handle a single .debug_types when we have an
2799 if (VEC_length (dwarf2_section_info_def
, dwarf2_per_objfile
->types
) != 1)
2802 section
= VEC_index (dwarf2_section_info_def
,
2803 dwarf2_per_objfile
->types
, 0);
2805 create_signatured_type_table_from_index (objfile
, section
, types_list
,
2806 types_list_elements
);
2809 create_addrmap_from_index (objfile
, &local_map
);
2811 map
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (struct mapped_index
));
2814 dwarf2_per_objfile
->index_table
= map
;
2815 dwarf2_per_objfile
->using_index
= 1;
2816 dwarf2_per_objfile
->quick_file_names_table
=
2817 create_quick_file_names_table (dwarf2_per_objfile
->n_comp_units
);
2822 /* A helper for the "quick" functions which sets the global
2823 dwarf2_per_objfile according to OBJFILE. */
2826 dw2_setup (struct objfile
*objfile
)
2828 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
2829 gdb_assert (dwarf2_per_objfile
);
2832 /* die_reader_func for dw2_get_file_names. */
2835 dw2_get_file_names_reader (const struct die_reader_specs
*reader
,
2837 struct die_info
*comp_unit_die
,
2841 struct dwarf2_cu
*cu
= reader
->cu
;
2842 struct dwarf2_per_cu_data
*this_cu
= cu
->per_cu
;
2843 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
2844 struct dwarf2_per_cu_data
*lh_cu
;
2845 struct line_header
*lh
;
2846 struct attribute
*attr
;
2848 const char *name
, *comp_dir
;
2850 struct quick_file_names
*qfn
;
2851 unsigned int line_offset
;
2853 /* Our callers never want to match partial units -- instead they
2854 will match the enclosing full CU. */
2855 if (comp_unit_die
->tag
== DW_TAG_partial_unit
)
2857 this_cu
->v
.quick
->no_file_data
= 1;
2861 /* If we're reading the line header for TUs, store it in the "per_cu"
2863 if (this_cu
->is_debug_types
)
2865 struct type_unit_group
*tu_group
= data
;
2867 gdb_assert (tu_group
!= NULL
);
2868 lh_cu
= &tu_group
->per_cu
;
2877 attr
= dwarf2_attr (comp_unit_die
, DW_AT_stmt_list
, cu
);
2880 struct quick_file_names find_entry
;
2882 line_offset
= DW_UNSND (attr
);
2884 /* We may have already read in this line header (TU line header sharing).
2885 If we have we're done. */
2886 find_entry
.hash
.dwo_unit
= cu
->dwo_unit
;
2887 find_entry
.hash
.line_offset
.sect_off
= line_offset
;
2888 slot
= htab_find_slot (dwarf2_per_objfile
->quick_file_names_table
,
2889 &find_entry
, INSERT
);
2892 lh_cu
->v
.quick
->file_names
= *slot
;
2896 lh
= dwarf_decode_line_header (line_offset
, cu
);
2900 lh_cu
->v
.quick
->no_file_data
= 1;
2904 qfn
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (*qfn
));
2905 qfn
->hash
.dwo_unit
= cu
->dwo_unit
;
2906 qfn
->hash
.line_offset
.sect_off
= line_offset
;
2907 gdb_assert (slot
!= NULL
);
2910 find_file_and_directory (comp_unit_die
, cu
, &name
, &comp_dir
);
2912 qfn
->num_file_names
= lh
->num_file_names
;
2913 qfn
->file_names
= obstack_alloc (&objfile
->objfile_obstack
,
2914 lh
->num_file_names
* sizeof (char *));
2915 for (i
= 0; i
< lh
->num_file_names
; ++i
)
2916 qfn
->file_names
[i
] = file_full_name (i
+ 1, lh
, comp_dir
);
2917 qfn
->real_names
= NULL
;
2919 free_line_header (lh
);
2921 lh_cu
->v
.quick
->file_names
= qfn
;
2924 /* A helper for the "quick" functions which attempts to read the line
2925 table for THIS_CU. */
2927 static struct quick_file_names
*
2928 dw2_get_file_names (struct objfile
*objfile
,
2929 struct dwarf2_per_cu_data
*this_cu
)
2931 /* For TUs this should only be called on the parent group. */
2932 if (this_cu
->is_debug_types
)
2933 gdb_assert (IS_TYPE_UNIT_GROUP (this_cu
));
2935 if (this_cu
->v
.quick
->file_names
!= NULL
)
2936 return this_cu
->v
.quick
->file_names
;
2937 /* If we know there is no line data, no point in looking again. */
2938 if (this_cu
->v
.quick
->no_file_data
)
2941 /* If DWO files are in use, we can still find the DW_AT_stmt_list attribute
2942 in the stub for CUs, there's is no need to lookup the DWO file.
2943 However, that's not the case for TUs where DW_AT_stmt_list lives in the
2945 if (this_cu
->is_debug_types
)
2947 struct type_unit_group
*tu_group
= this_cu
->type_unit_group
;
2949 init_cutu_and_read_dies (tu_group
->t
.first_tu
, NULL
, 0, 0,
2950 dw2_get_file_names_reader
, tu_group
);
2953 init_cutu_and_read_dies_simple (this_cu
, dw2_get_file_names_reader
, NULL
);
2955 if (this_cu
->v
.quick
->no_file_data
)
2957 return this_cu
->v
.quick
->file_names
;
2960 /* A helper for the "quick" functions which computes and caches the
2961 real path for a given file name from the line table. */
2964 dw2_get_real_path (struct objfile
*objfile
,
2965 struct quick_file_names
*qfn
, int index
)
2967 if (qfn
->real_names
== NULL
)
2968 qfn
->real_names
= OBSTACK_CALLOC (&objfile
->objfile_obstack
,
2969 qfn
->num_file_names
, sizeof (char *));
2971 if (qfn
->real_names
[index
] == NULL
)
2972 qfn
->real_names
[index
] = gdb_realpath (qfn
->file_names
[index
]);
2974 return qfn
->real_names
[index
];
2977 static struct symtab
*
2978 dw2_find_last_source_symtab (struct objfile
*objfile
)
2982 dw2_setup (objfile
);
2983 index
= dwarf2_per_objfile
->n_comp_units
- 1;
2984 return dw2_instantiate_symtab (dw2_get_cu (index
));
2987 /* Traversal function for dw2_forget_cached_source_info. */
2990 dw2_free_cached_file_names (void **slot
, void *info
)
2992 struct quick_file_names
*file_data
= (struct quick_file_names
*) *slot
;
2994 if (file_data
->real_names
)
2998 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
3000 xfree ((void*) file_data
->real_names
[i
]);
3001 file_data
->real_names
[i
] = NULL
;
3009 dw2_forget_cached_source_info (struct objfile
*objfile
)
3011 dw2_setup (objfile
);
3013 htab_traverse_noresize (dwarf2_per_objfile
->quick_file_names_table
,
3014 dw2_free_cached_file_names
, NULL
);
3017 /* Helper function for dw2_map_symtabs_matching_filename that expands
3018 the symtabs and calls the iterator. */
3021 dw2_map_expand_apply (struct objfile
*objfile
,
3022 struct dwarf2_per_cu_data
*per_cu
,
3024 const char *full_path
, const char *real_path
,
3025 int (*callback
) (struct symtab
*, void *),
3028 struct symtab
*last_made
= objfile
->symtabs
;
3030 /* Don't visit already-expanded CUs. */
3031 if (per_cu
->v
.quick
->symtab
)
3034 /* This may expand more than one symtab, and we want to iterate over
3036 dw2_instantiate_symtab (per_cu
);
3038 return iterate_over_some_symtabs (name
, full_path
, real_path
, callback
, data
,
3039 objfile
->symtabs
, last_made
);
3042 /* Implementation of the map_symtabs_matching_filename method. */
3045 dw2_map_symtabs_matching_filename (struct objfile
*objfile
, const char *name
,
3046 const char *full_path
, const char *real_path
,
3047 int (*callback
) (struct symtab
*, void *),
3051 const char *name_basename
= lbasename (name
);
3052 int is_abs
= IS_ABSOLUTE_PATH (name
);
3054 dw2_setup (objfile
);
3056 /* The rule is CUs specify all the files, including those used by
3057 any TU, so there's no need to scan TUs here. */
3059 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
3062 struct dwarf2_per_cu_data
*per_cu
= dw2_get_primary_cu (i
);
3063 struct quick_file_names
*file_data
;
3065 /* We only need to look at symtabs not already expanded. */
3066 if (per_cu
->v
.quick
->symtab
)
3069 file_data
= dw2_get_file_names (objfile
, per_cu
);
3070 if (file_data
== NULL
)
3073 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
3075 const char *this_name
= file_data
->file_names
[j
];
3077 if (FILENAME_CMP (name
, this_name
) == 0
3078 || (!is_abs
&& compare_filenames_for_search (this_name
, name
)))
3080 if (dw2_map_expand_apply (objfile
, per_cu
,
3081 name
, full_path
, real_path
,
3086 /* Before we invoke realpath, which can get expensive when many
3087 files are involved, do a quick comparison of the basenames. */
3088 if (! basenames_may_differ
3089 && FILENAME_CMP (lbasename (this_name
), name_basename
) != 0)
3092 if (full_path
!= NULL
)
3094 const char *this_real_name
= dw2_get_real_path (objfile
,
3097 if (this_real_name
!= NULL
3098 && (FILENAME_CMP (full_path
, this_real_name
) == 0
3100 && compare_filenames_for_search (this_real_name
,
3103 if (dw2_map_expand_apply (objfile
, per_cu
,
3104 name
, full_path
, real_path
,
3110 if (real_path
!= NULL
)
3112 const char *this_real_name
= dw2_get_real_path (objfile
,
3115 if (this_real_name
!= NULL
3116 && (FILENAME_CMP (real_path
, this_real_name
) == 0
3118 && compare_filenames_for_search (this_real_name
,
3121 if (dw2_map_expand_apply (objfile
, per_cu
,
3122 name
, full_path
, real_path
,
3133 /* Struct used to manage iterating over all CUs looking for a symbol. */
3135 struct dw2_symtab_iterator
3137 /* The internalized form of .gdb_index. */
3138 struct mapped_index
*index
;
3139 /* If non-zero, only look for symbols that match BLOCK_INDEX. */
3140 int want_specific_block
;
3141 /* One of GLOBAL_BLOCK or STATIC_BLOCK.
3142 Unused if !WANT_SPECIFIC_BLOCK. */
3144 /* The kind of symbol we're looking for. */
3146 /* The list of CUs from the index entry of the symbol,
3147 or NULL if not found. */
3149 /* The next element in VEC to look at. */
3151 /* The number of elements in VEC, or zero if there is no match. */
3155 /* Initialize the index symtab iterator ITER.
3156 If WANT_SPECIFIC_BLOCK is non-zero, only look for symbols
3157 in block BLOCK_INDEX. Otherwise BLOCK_INDEX is ignored. */
3160 dw2_symtab_iter_init (struct dw2_symtab_iterator
*iter
,
3161 struct mapped_index
*index
,
3162 int want_specific_block
,
3167 iter
->index
= index
;
3168 iter
->want_specific_block
= want_specific_block
;
3169 iter
->block_index
= block_index
;
3170 iter
->domain
= domain
;
3173 if (find_slot_in_mapped_hash (index
, name
, &iter
->vec
))
3174 iter
->length
= MAYBE_SWAP (*iter
->vec
);
3182 /* Return the next matching CU or NULL if there are no more. */
3184 static struct dwarf2_per_cu_data
*
3185 dw2_symtab_iter_next (struct dw2_symtab_iterator
*iter
)
3187 for ( ; iter
->next
< iter
->length
; ++iter
->next
)
3189 offset_type cu_index_and_attrs
=
3190 MAYBE_SWAP (iter
->vec
[iter
->next
+ 1]);
3191 offset_type cu_index
= GDB_INDEX_CU_VALUE (cu_index_and_attrs
);
3192 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (cu_index
);
3193 int want_static
= iter
->block_index
!= GLOBAL_BLOCK
;
3194 /* This value is only valid for index versions >= 7. */
3195 int is_static
= GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs
);
3196 gdb_index_symbol_kind symbol_kind
=
3197 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs
);
3198 /* Only check the symbol attributes if they're present.
3199 Indices prior to version 7 don't record them,
3200 and indices >= 7 may elide them for certain symbols
3201 (gold does this). */
3203 (iter
->index
->version
>= 7
3204 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_NONE
);
3206 /* Skip if already read in. */
3207 if (per_cu
->v
.quick
->symtab
)
3211 && iter
->want_specific_block
3212 && want_static
!= is_static
)
3215 /* Only check the symbol's kind if it has one. */
3218 switch (iter
->domain
)
3221 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_VARIABLE
3222 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_FUNCTION
3223 /* Some types are also in VAR_DOMAIN. */
3224 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
3228 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
3232 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_OTHER
)
3247 static struct symtab
*
3248 dw2_lookup_symbol (struct objfile
*objfile
, int block_index
,
3249 const char *name
, domain_enum domain
)
3251 struct symtab
*stab_best
= NULL
;
3252 struct mapped_index
*index
;
3254 dw2_setup (objfile
);
3256 index
= dwarf2_per_objfile
->index_table
;
3258 /* index is NULL if OBJF_READNOW. */
3261 struct dw2_symtab_iterator iter
;
3262 struct dwarf2_per_cu_data
*per_cu
;
3264 dw2_symtab_iter_init (&iter
, index
, 1, block_index
, domain
, name
);
3266 while ((per_cu
= dw2_symtab_iter_next (&iter
)) != NULL
)
3268 struct symbol
*sym
= NULL
;
3269 struct symtab
*stab
= dw2_instantiate_symtab (per_cu
);
3271 /* Some caution must be observed with overloaded functions
3272 and methods, since the index will not contain any overload
3273 information (but NAME might contain it). */
3276 struct blockvector
*bv
= BLOCKVECTOR (stab
);
3277 struct block
*block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
3279 sym
= lookup_block_symbol (block
, name
, domain
);
3282 if (sym
&& strcmp_iw (SYMBOL_SEARCH_NAME (sym
), name
) == 0)
3284 if (!TYPE_IS_OPAQUE (SYMBOL_TYPE (sym
)))
3290 /* Keep looking through other CUs. */
3298 dw2_print_stats (struct objfile
*objfile
)
3302 dw2_setup (objfile
);
3304 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
3305 + dwarf2_per_objfile
->n_type_units
); ++i
)
3307 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
3309 if (!per_cu
->v
.quick
->symtab
)
3312 printf_filtered (_(" Number of unread CUs: %d\n"), count
);
3316 dw2_dump (struct objfile
*objfile
)
3318 /* Nothing worth printing. */
3322 dw2_relocate (struct objfile
*objfile
, struct section_offsets
*new_offsets
,
3323 struct section_offsets
*delta
)
3325 /* There's nothing to relocate here. */
3329 dw2_expand_symtabs_for_function (struct objfile
*objfile
,
3330 const char *func_name
)
3332 struct mapped_index
*index
;
3334 dw2_setup (objfile
);
3336 index
= dwarf2_per_objfile
->index_table
;
3338 /* index is NULL if OBJF_READNOW. */
3341 struct dw2_symtab_iterator iter
;
3342 struct dwarf2_per_cu_data
*per_cu
;
3344 /* Note: It doesn't matter what we pass for block_index here. */
3345 dw2_symtab_iter_init (&iter
, index
, 0, GLOBAL_BLOCK
, VAR_DOMAIN
,
3348 while ((per_cu
= dw2_symtab_iter_next (&iter
)) != NULL
)
3349 dw2_instantiate_symtab (per_cu
);
3354 dw2_expand_all_symtabs (struct objfile
*objfile
)
3358 dw2_setup (objfile
);
3360 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
3361 + dwarf2_per_objfile
->n_type_units
); ++i
)
3363 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
3365 dw2_instantiate_symtab (per_cu
);
3370 dw2_expand_symtabs_with_filename (struct objfile
*objfile
,
3371 const char *filename
)
3375 dw2_setup (objfile
);
3377 /* We don't need to consider type units here.
3378 This is only called for examining code, e.g. expand_line_sal.
3379 There can be an order of magnitude (or more) more type units
3380 than comp units, and we avoid them if we can. */
3382 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
3385 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
3386 struct quick_file_names
*file_data
;
3388 /* We only need to look at symtabs not already expanded. */
3389 if (per_cu
->v
.quick
->symtab
)
3392 file_data
= dw2_get_file_names (objfile
, per_cu
);
3393 if (file_data
== NULL
)
3396 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
3398 const char *this_name
= file_data
->file_names
[j
];
3399 if (FILENAME_CMP (this_name
, filename
) == 0)
3401 dw2_instantiate_symtab (per_cu
);
3408 /* A helper function for dw2_find_symbol_file that finds the primary
3409 file name for a given CU. This is a die_reader_func. */
3412 dw2_get_primary_filename_reader (const struct die_reader_specs
*reader
,
3414 struct die_info
*comp_unit_die
,
3418 const char **result_ptr
= data
;
3419 struct dwarf2_cu
*cu
= reader
->cu
;
3420 struct attribute
*attr
;
3422 attr
= dwarf2_attr (comp_unit_die
, DW_AT_name
, cu
);
3426 *result_ptr
= DW_STRING (attr
);
3430 dw2_find_symbol_file (struct objfile
*objfile
, const char *name
)
3432 struct dwarf2_per_cu_data
*per_cu
;
3434 const char *filename
;
3436 dw2_setup (objfile
);
3438 /* index_table is NULL if OBJF_READNOW. */
3439 if (!dwarf2_per_objfile
->index_table
)
3443 ALL_OBJFILE_PRIMARY_SYMTABS (objfile
, s
)
3445 struct blockvector
*bv
= BLOCKVECTOR (s
);
3446 const struct block
*block
= BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
);
3447 struct symbol
*sym
= lookup_block_symbol (block
, name
, VAR_DOMAIN
);
3450 return SYMBOL_SYMTAB (sym
)->filename
;
3455 if (!find_slot_in_mapped_hash (dwarf2_per_objfile
->index_table
,
3459 /* Note that this just looks at the very first one named NAME -- but
3460 actually we are looking for a function. find_main_filename
3461 should be rewritten so that it doesn't require a custom hook. It
3462 could just use the ordinary symbol tables. */
3463 /* vec[0] is the length, which must always be >0. */
3464 per_cu
= dw2_get_cu (GDB_INDEX_CU_VALUE (MAYBE_SWAP (vec
[1])));
3466 if (per_cu
->v
.quick
->symtab
!= NULL
)
3467 return per_cu
->v
.quick
->symtab
->filename
;
3469 init_cutu_and_read_dies (per_cu
, NULL
, 0, 0,
3470 dw2_get_primary_filename_reader
, &filename
);
3476 dw2_map_matching_symbols (const char * name
, domain_enum
namespace,
3477 struct objfile
*objfile
, int global
,
3478 int (*callback
) (struct block
*,
3479 struct symbol
*, void *),
3480 void *data
, symbol_compare_ftype
*match
,
3481 symbol_compare_ftype
*ordered_compare
)
3483 /* Currently unimplemented; used for Ada. The function can be called if the
3484 current language is Ada for a non-Ada objfile using GNU index. As Ada
3485 does not look for non-Ada symbols this function should just return. */
3489 dw2_expand_symtabs_matching
3490 (struct objfile
*objfile
,
3491 int (*file_matcher
) (const char *, void *),
3492 int (*name_matcher
) (const char *, void *),
3493 enum search_domain kind
,
3498 struct mapped_index
*index
;
3500 dw2_setup (objfile
);
3502 /* index_table is NULL if OBJF_READNOW. */
3503 if (!dwarf2_per_objfile
->index_table
)
3505 index
= dwarf2_per_objfile
->index_table
;
3507 if (file_matcher
!= NULL
)
3509 struct cleanup
*cleanup
;
3510 htab_t visited_found
, visited_not_found
;
3512 visited_found
= htab_create_alloc (10,
3513 htab_hash_pointer
, htab_eq_pointer
,
3514 NULL
, xcalloc
, xfree
);
3515 cleanup
= make_cleanup_htab_delete (visited_found
);
3516 visited_not_found
= htab_create_alloc (10,
3517 htab_hash_pointer
, htab_eq_pointer
,
3518 NULL
, xcalloc
, xfree
);
3519 make_cleanup_htab_delete (visited_not_found
);
3521 /* The rule is CUs specify all the files, including those used by
3522 any TU, so there's no need to scan TUs here. */
3524 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
3527 struct dwarf2_per_cu_data
*per_cu
= dw2_get_primary_cu (i
);
3528 struct quick_file_names
*file_data
;
3531 per_cu
->v
.quick
->mark
= 0;
3533 /* We only need to look at symtabs not already expanded. */
3534 if (per_cu
->v
.quick
->symtab
)
3537 file_data
= dw2_get_file_names (objfile
, per_cu
);
3538 if (file_data
== NULL
)
3541 if (htab_find (visited_not_found
, file_data
) != NULL
)
3543 else if (htab_find (visited_found
, file_data
) != NULL
)
3545 per_cu
->v
.quick
->mark
= 1;
3549 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
3551 if (file_matcher (file_data
->file_names
[j
], data
))
3553 per_cu
->v
.quick
->mark
= 1;
3558 slot
= htab_find_slot (per_cu
->v
.quick
->mark
3560 : visited_not_found
,
3565 do_cleanups (cleanup
);
3568 for (iter
= 0; iter
< index
->symbol_table_slots
; ++iter
)
3570 offset_type idx
= 2 * iter
;
3572 offset_type
*vec
, vec_len
, vec_idx
;
3574 if (index
->symbol_table
[idx
] == 0 && index
->symbol_table
[idx
+ 1] == 0)
3577 name
= index
->constant_pool
+ MAYBE_SWAP (index
->symbol_table
[idx
]);
3579 if (! (*name_matcher
) (name
, data
))
3582 /* The name was matched, now expand corresponding CUs that were
3584 vec
= (offset_type
*) (index
->constant_pool
3585 + MAYBE_SWAP (index
->symbol_table
[idx
+ 1]));
3586 vec_len
= MAYBE_SWAP (vec
[0]);
3587 for (vec_idx
= 0; vec_idx
< vec_len
; ++vec_idx
)
3589 struct dwarf2_per_cu_data
*per_cu
;
3590 offset_type cu_index_and_attrs
= MAYBE_SWAP (vec
[vec_idx
+ 1]);
3591 gdb_index_symbol_kind symbol_kind
=
3592 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs
);
3593 int cu_index
= GDB_INDEX_CU_VALUE (cu_index_and_attrs
);
3595 /* Don't crash on bad data. */
3596 if (cu_index
>= (dwarf2_per_objfile
->n_comp_units
3597 + dwarf2_per_objfile
->n_type_units
))
3600 /* Only check the symbol's kind if it has one.
3601 Indices prior to version 7 don't record it. */
3602 if (index
->version
>= 7)
3606 case VARIABLES_DOMAIN
:
3607 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_VARIABLE
)
3610 case FUNCTIONS_DOMAIN
:
3611 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_FUNCTION
)
3615 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
3623 per_cu
= dw2_get_cu (cu_index
);
3624 if (file_matcher
== NULL
|| per_cu
->v
.quick
->mark
)
3625 dw2_instantiate_symtab (per_cu
);
3630 /* A helper for dw2_find_pc_sect_symtab which finds the most specific
3633 static struct symtab
*
3634 recursively_find_pc_sect_symtab (struct symtab
*symtab
, CORE_ADDR pc
)
3638 if (BLOCKVECTOR (symtab
) != NULL
3639 && blockvector_contains_pc (BLOCKVECTOR (symtab
), pc
))
3642 if (symtab
->includes
== NULL
)
3645 for (i
= 0; symtab
->includes
[i
]; ++i
)
3647 struct symtab
*s
= symtab
->includes
[i
];
3649 s
= recursively_find_pc_sect_symtab (s
, pc
);
3657 static struct symtab
*
3658 dw2_find_pc_sect_symtab (struct objfile
*objfile
,
3659 struct minimal_symbol
*msymbol
,
3661 struct obj_section
*section
,
3664 struct dwarf2_per_cu_data
*data
;
3665 struct symtab
*result
;
3667 dw2_setup (objfile
);
3669 if (!objfile
->psymtabs_addrmap
)
3672 data
= addrmap_find (objfile
->psymtabs_addrmap
, pc
);
3676 if (warn_if_readin
&& data
->v
.quick
->symtab
)
3677 warning (_("(Internal error: pc %s in read in CU, but not in symtab.)"),
3678 paddress (get_objfile_arch (objfile
), pc
));
3680 result
= recursively_find_pc_sect_symtab (dw2_instantiate_symtab (data
), pc
);
3681 gdb_assert (result
!= NULL
);
3686 dw2_map_symbol_filenames (struct objfile
*objfile
, symbol_filename_ftype
*fun
,
3687 void *data
, int need_fullname
)
3690 struct cleanup
*cleanup
;
3691 htab_t visited
= htab_create_alloc (10, htab_hash_pointer
, htab_eq_pointer
,
3692 NULL
, xcalloc
, xfree
);
3694 cleanup
= make_cleanup_htab_delete (visited
);
3695 dw2_setup (objfile
);
3697 /* The rule is CUs specify all the files, including those used by
3698 any TU, so there's no need to scan TUs here.
3699 We can ignore file names coming from already-expanded CUs. */
3701 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
3703 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
3705 if (per_cu
->v
.quick
->symtab
)
3707 void **slot
= htab_find_slot (visited
, per_cu
->v
.quick
->file_names
,
3710 *slot
= per_cu
->v
.quick
->file_names
;
3714 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
3717 struct dwarf2_per_cu_data
*per_cu
= dw2_get_primary_cu (i
);
3718 struct quick_file_names
*file_data
;
3721 /* We only need to look at symtabs not already expanded. */
3722 if (per_cu
->v
.quick
->symtab
)
3725 file_data
= dw2_get_file_names (objfile
, per_cu
);
3726 if (file_data
== NULL
)
3729 slot
= htab_find_slot (visited
, file_data
, INSERT
);
3732 /* Already visited. */
3737 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
3739 const char *this_real_name
;
3742 this_real_name
= dw2_get_real_path (objfile
, file_data
, j
);
3744 this_real_name
= NULL
;
3745 (*fun
) (file_data
->file_names
[j
], this_real_name
, data
);
3749 do_cleanups (cleanup
);
3753 dw2_has_symbols (struct objfile
*objfile
)
3758 const struct quick_symbol_functions dwarf2_gdb_index_functions
=
3761 dw2_find_last_source_symtab
,
3762 dw2_forget_cached_source_info
,
3763 dw2_map_symtabs_matching_filename
,
3768 dw2_expand_symtabs_for_function
,
3769 dw2_expand_all_symtabs
,
3770 dw2_expand_symtabs_with_filename
,
3771 dw2_find_symbol_file
,
3772 dw2_map_matching_symbols
,
3773 dw2_expand_symtabs_matching
,
3774 dw2_find_pc_sect_symtab
,
3775 dw2_map_symbol_filenames
3778 /* Initialize for reading DWARF for this objfile. Return 0 if this
3779 file will use psymtabs, or 1 if using the GNU index. */
3782 dwarf2_initialize_objfile (struct objfile
*objfile
)
3784 /* If we're about to read full symbols, don't bother with the
3785 indices. In this case we also don't care if some other debug
3786 format is making psymtabs, because they are all about to be
3788 if ((objfile
->flags
& OBJF_READNOW
))
3792 dwarf2_per_objfile
->using_index
= 1;
3793 create_all_comp_units (objfile
);
3794 create_all_type_units (objfile
);
3795 dwarf2_per_objfile
->quick_file_names_table
=
3796 create_quick_file_names_table (dwarf2_per_objfile
->n_comp_units
);
3798 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
3799 + dwarf2_per_objfile
->n_type_units
); ++i
)
3801 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
3803 per_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
3804 struct dwarf2_per_cu_quick_data
);
3807 /* Return 1 so that gdb sees the "quick" functions. However,
3808 these functions will be no-ops because we will have expanded
3813 if (dwarf2_read_index (objfile
))
3821 /* Build a partial symbol table. */
3824 dwarf2_build_psymtabs (struct objfile
*objfile
)
3826 volatile struct gdb_exception except
;
3828 if (objfile
->global_psymbols
.size
== 0 && objfile
->static_psymbols
.size
== 0)
3830 init_psymbol_list (objfile
, 1024);
3833 TRY_CATCH (except
, RETURN_MASK_ERROR
)
3835 /* This isn't really ideal: all the data we allocate on the
3836 objfile's obstack is still uselessly kept around. However,
3837 freeing it seems unsafe. */
3838 struct cleanup
*cleanups
= make_cleanup_discard_psymtabs (objfile
);
3840 dwarf2_build_psymtabs_hard (objfile
);
3841 discard_cleanups (cleanups
);
3843 if (except
.reason
< 0)
3844 exception_print (gdb_stderr
, except
);
3847 /* Return the total length of the CU described by HEADER. */
3850 get_cu_length (const struct comp_unit_head
*header
)
3852 return header
->initial_length_size
+ header
->length
;
3855 /* Return TRUE if OFFSET is within CU_HEADER. */
3858 offset_in_cu_p (const struct comp_unit_head
*cu_header
, sect_offset offset
)
3860 sect_offset bottom
= { cu_header
->offset
.sect_off
};
3861 sect_offset top
= { cu_header
->offset
.sect_off
+ get_cu_length (cu_header
) };
3863 return (offset
.sect_off
>= bottom
.sect_off
&& offset
.sect_off
< top
.sect_off
);
3866 /* Find the base address of the compilation unit for range lists and
3867 location lists. It will normally be specified by DW_AT_low_pc.
3868 In DWARF-3 draft 4, the base address could be overridden by
3869 DW_AT_entry_pc. It's been removed, but GCC still uses this for
3870 compilation units with discontinuous ranges. */
3873 dwarf2_find_base_address (struct die_info
*die
, struct dwarf2_cu
*cu
)
3875 struct attribute
*attr
;
3878 cu
->base_address
= 0;
3880 attr
= dwarf2_attr (die
, DW_AT_entry_pc
, cu
);
3883 cu
->base_address
= DW_ADDR (attr
);
3888 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
3891 cu
->base_address
= DW_ADDR (attr
);
3897 /* Read in the comp unit header information from the debug_info at info_ptr.
3898 NOTE: This leaves members offset, first_die_offset to be filled in
3902 read_comp_unit_head (struct comp_unit_head
*cu_header
,
3903 gdb_byte
*info_ptr
, bfd
*abfd
)
3906 unsigned int bytes_read
;
3908 cu_header
->length
= read_initial_length (abfd
, info_ptr
, &bytes_read
);
3909 cu_header
->initial_length_size
= bytes_read
;
3910 cu_header
->offset_size
= (bytes_read
== 4) ? 4 : 8;
3911 info_ptr
+= bytes_read
;
3912 cu_header
->version
= read_2_bytes (abfd
, info_ptr
);
3914 cu_header
->abbrev_offset
.sect_off
= read_offset (abfd
, info_ptr
, cu_header
,
3916 info_ptr
+= bytes_read
;
3917 cu_header
->addr_size
= read_1_byte (abfd
, info_ptr
);
3919 signed_addr
= bfd_get_sign_extend_vma (abfd
);
3920 if (signed_addr
< 0)
3921 internal_error (__FILE__
, __LINE__
,
3922 _("read_comp_unit_head: dwarf from non elf file"));
3923 cu_header
->signed_addr_p
= signed_addr
;
3928 /* Helper function that returns the proper abbrev section for
3931 static struct dwarf2_section_info
*
3932 get_abbrev_section_for_cu (struct dwarf2_per_cu_data
*this_cu
)
3934 struct dwarf2_section_info
*abbrev
;
3936 if (this_cu
->is_dwz
)
3937 abbrev
= &dwarf2_get_dwz_file ()->abbrev
;
3939 abbrev
= &dwarf2_per_objfile
->abbrev
;
3944 /* Subroutine of read_and_check_comp_unit_head and
3945 read_and_check_type_unit_head to simplify them.
3946 Perform various error checking on the header. */
3949 error_check_comp_unit_head (struct comp_unit_head
*header
,
3950 struct dwarf2_section_info
*section
,
3951 struct dwarf2_section_info
*abbrev_section
)
3953 bfd
*abfd
= section
->asection
->owner
;
3954 const char *filename
= bfd_get_filename (abfd
);
3956 if (header
->version
!= 2 && header
->version
!= 3 && header
->version
!= 4)
3957 error (_("Dwarf Error: wrong version in compilation unit header "
3958 "(is %d, should be 2, 3, or 4) [in module %s]"), header
->version
,
3961 if (header
->abbrev_offset
.sect_off
3962 >= dwarf2_section_size (dwarf2_per_objfile
->objfile
, abbrev_section
))
3963 error (_("Dwarf Error: bad offset (0x%lx) in compilation unit header "
3964 "(offset 0x%lx + 6) [in module %s]"),
3965 (long) header
->abbrev_offset
.sect_off
, (long) header
->offset
.sect_off
,
3968 /* Cast to unsigned long to use 64-bit arithmetic when possible to
3969 avoid potential 32-bit overflow. */
3970 if (((unsigned long) header
->offset
.sect_off
+ get_cu_length (header
))
3972 error (_("Dwarf Error: bad length (0x%lx) in compilation unit header "
3973 "(offset 0x%lx + 0) [in module %s]"),
3974 (long) header
->length
, (long) header
->offset
.sect_off
,
3978 /* Read in a CU/TU header and perform some basic error checking.
3979 The contents of the header are stored in HEADER.
3980 The result is a pointer to the start of the first DIE. */
3983 read_and_check_comp_unit_head (struct comp_unit_head
*header
,
3984 struct dwarf2_section_info
*section
,
3985 struct dwarf2_section_info
*abbrev_section
,
3987 int is_debug_types_section
)
3989 gdb_byte
*beg_of_comp_unit
= info_ptr
;
3990 bfd
*abfd
= section
->asection
->owner
;
3992 header
->offset
.sect_off
= beg_of_comp_unit
- section
->buffer
;
3994 info_ptr
= read_comp_unit_head (header
, info_ptr
, abfd
);
3996 /* If we're reading a type unit, skip over the signature and
3997 type_offset fields. */
3998 if (is_debug_types_section
)
3999 info_ptr
+= 8 /*signature*/ + header
->offset_size
;
4001 header
->first_die_offset
.cu_off
= info_ptr
- beg_of_comp_unit
;
4003 error_check_comp_unit_head (header
, section
, abbrev_section
);
4008 /* Read in the types comp unit header information from .debug_types entry at
4009 types_ptr. The result is a pointer to one past the end of the header. */
4012 read_and_check_type_unit_head (struct comp_unit_head
*header
,
4013 struct dwarf2_section_info
*section
,
4014 struct dwarf2_section_info
*abbrev_section
,
4016 ULONGEST
*signature
,
4017 cu_offset
*type_offset_in_tu
)
4019 gdb_byte
*beg_of_comp_unit
= info_ptr
;
4020 bfd
*abfd
= section
->asection
->owner
;
4022 header
->offset
.sect_off
= beg_of_comp_unit
- section
->buffer
;
4024 info_ptr
= read_comp_unit_head (header
, info_ptr
, abfd
);
4026 /* If we're reading a type unit, skip over the signature and
4027 type_offset fields. */
4028 if (signature
!= NULL
)
4029 *signature
= read_8_bytes (abfd
, info_ptr
);
4031 if (type_offset_in_tu
!= NULL
)
4032 type_offset_in_tu
->cu_off
= read_offset_1 (abfd
, info_ptr
,
4033 header
->offset_size
);
4034 info_ptr
+= header
->offset_size
;
4036 header
->first_die_offset
.cu_off
= info_ptr
- beg_of_comp_unit
;
4038 error_check_comp_unit_head (header
, section
, abbrev_section
);
4043 /* Fetch the abbreviation table offset from a comp or type unit header. */
4046 read_abbrev_offset (struct dwarf2_section_info
*section
,
4049 bfd
*abfd
= section
->asection
->owner
;
4051 unsigned int length
, initial_length_size
, offset_size
;
4052 sect_offset abbrev_offset
;
4054 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
4055 info_ptr
= section
->buffer
+ offset
.sect_off
;
4056 length
= read_initial_length (abfd
, info_ptr
, &initial_length_size
);
4057 offset_size
= initial_length_size
== 4 ? 4 : 8;
4058 info_ptr
+= initial_length_size
+ 2 /*version*/;
4059 abbrev_offset
.sect_off
= read_offset_1 (abfd
, info_ptr
, offset_size
);
4060 return abbrev_offset
;
4063 /* Allocate a new partial symtab for file named NAME and mark this new
4064 partial symtab as being an include of PST. */
4067 dwarf2_create_include_psymtab (char *name
, struct partial_symtab
*pst
,
4068 struct objfile
*objfile
)
4070 struct partial_symtab
*subpst
= allocate_psymtab (name
, objfile
);
4072 subpst
->section_offsets
= pst
->section_offsets
;
4073 subpst
->textlow
= 0;
4074 subpst
->texthigh
= 0;
4076 subpst
->dependencies
= (struct partial_symtab
**)
4077 obstack_alloc (&objfile
->objfile_obstack
,
4078 sizeof (struct partial_symtab
*));
4079 subpst
->dependencies
[0] = pst
;
4080 subpst
->number_of_dependencies
= 1;
4082 subpst
->globals_offset
= 0;
4083 subpst
->n_global_syms
= 0;
4084 subpst
->statics_offset
= 0;
4085 subpst
->n_static_syms
= 0;
4086 subpst
->symtab
= NULL
;
4087 subpst
->read_symtab
= pst
->read_symtab
;
4090 /* No private part is necessary for include psymtabs. This property
4091 can be used to differentiate between such include psymtabs and
4092 the regular ones. */
4093 subpst
->read_symtab_private
= NULL
;
4096 /* Read the Line Number Program data and extract the list of files
4097 included by the source file represented by PST. Build an include
4098 partial symtab for each of these included files. */
4101 dwarf2_build_include_psymtabs (struct dwarf2_cu
*cu
,
4102 struct die_info
*die
,
4103 struct partial_symtab
*pst
)
4105 struct line_header
*lh
= NULL
;
4106 struct attribute
*attr
;
4108 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
4110 lh
= dwarf_decode_line_header (DW_UNSND (attr
), cu
);
4112 return; /* No linetable, so no includes. */
4114 /* NOTE: pst->dirname is DW_AT_comp_dir (if present). */
4115 dwarf_decode_lines (lh
, pst
->dirname
, cu
, pst
, 1);
4117 free_line_header (lh
);
4121 hash_signatured_type (const void *item
)
4123 const struct signatured_type
*sig_type
= item
;
4125 /* This drops the top 32 bits of the signature, but is ok for a hash. */
4126 return sig_type
->signature
;
4130 eq_signatured_type (const void *item_lhs
, const void *item_rhs
)
4132 const struct signatured_type
*lhs
= item_lhs
;
4133 const struct signatured_type
*rhs
= item_rhs
;
4135 return lhs
->signature
== rhs
->signature
;
4138 /* Allocate a hash table for signatured types. */
4141 allocate_signatured_type_table (struct objfile
*objfile
)
4143 return htab_create_alloc_ex (41,
4144 hash_signatured_type
,
4147 &objfile
->objfile_obstack
,
4148 hashtab_obstack_allocate
,
4149 dummy_obstack_deallocate
);
4152 /* A helper function to add a signatured type CU to a table. */
4155 add_signatured_type_cu_to_table (void **slot
, void *datum
)
4157 struct signatured_type
*sigt
= *slot
;
4158 struct signatured_type
***datap
= datum
;
4166 /* Create the hash table of all entries in the .debug_types section.
4167 DWO_FILE is a pointer to the DWO file for .debug_types.dwo,
4169 Note: This function processes DWO files only, not DWP files.
4170 The result is a pointer to the hash table or NULL if there are
4174 create_debug_types_hash_table (struct dwo_file
*dwo_file
,
4175 VEC (dwarf2_section_info_def
) *types
)
4177 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
4178 htab_t types_htab
= NULL
;
4180 struct dwarf2_section_info
*section
;
4181 struct dwarf2_section_info
*abbrev_section
;
4183 if (VEC_empty (dwarf2_section_info_def
, types
))
4186 abbrev_section
= (dwo_file
!= NULL
4187 ? &dwo_file
->sections
.abbrev
4188 : &dwarf2_per_objfile
->abbrev
);
4190 if (dwarf2_read_debug
)
4191 fprintf_unfiltered (gdb_stdlog
, "Reading .debug_types%s for %s:\n",
4192 dwo_file
? ".dwo" : "",
4193 bfd_get_filename (abbrev_section
->asection
->owner
));
4196 VEC_iterate (dwarf2_section_info_def
, types
, ix
, section
);
4200 gdb_byte
*info_ptr
, *end_ptr
;
4201 struct dwarf2_section_info
*abbrev_section
;
4203 dwarf2_read_section (objfile
, section
);
4204 info_ptr
= section
->buffer
;
4206 if (info_ptr
== NULL
)
4209 /* We can't set abfd until now because the section may be empty or
4210 not present, in which case section->asection will be NULL. */
4211 abfd
= section
->asection
->owner
;
4214 abbrev_section
= &dwo_file
->sections
.abbrev
;
4216 abbrev_section
= &dwarf2_per_objfile
->abbrev
;
4218 if (types_htab
== NULL
)
4221 types_htab
= allocate_dwo_unit_table (objfile
);
4223 types_htab
= allocate_signatured_type_table (objfile
);
4226 /* We don't use init_cutu_and_read_dies_simple, or some such, here
4227 because we don't need to read any dies: the signature is in the
4230 end_ptr
= info_ptr
+ section
->size
;
4231 while (info_ptr
< end_ptr
)
4234 cu_offset type_offset_in_tu
;
4236 struct signatured_type
*sig_type
;
4237 struct dwo_unit
*dwo_tu
;
4239 gdb_byte
*ptr
= info_ptr
;
4240 struct comp_unit_head header
;
4241 unsigned int length
;
4243 offset
.sect_off
= ptr
- section
->buffer
;
4245 /* We need to read the type's signature in order to build the hash
4246 table, but we don't need anything else just yet. */
4248 ptr
= read_and_check_type_unit_head (&header
, section
,
4249 abbrev_section
, ptr
,
4250 &signature
, &type_offset_in_tu
);
4252 length
= get_cu_length (&header
);
4254 /* Skip dummy type units. */
4255 if (ptr
>= info_ptr
+ length
4256 || peek_abbrev_code (abfd
, ptr
) == 0)
4265 dwo_tu
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
4267 dwo_tu
->dwo_file
= dwo_file
;
4268 dwo_tu
->signature
= signature
;
4269 dwo_tu
->type_offset_in_tu
= type_offset_in_tu
;
4270 dwo_tu
->info_or_types_section
= section
;
4271 dwo_tu
->offset
= offset
;
4272 dwo_tu
->length
= length
;
4276 /* N.B.: type_offset is not usable if this type uses a DWO file.
4277 The real type_offset is in the DWO file. */
4279 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
4280 struct signatured_type
);
4281 sig_type
->signature
= signature
;
4282 sig_type
->type_offset_in_tu
= type_offset_in_tu
;
4283 sig_type
->per_cu
.objfile
= objfile
;
4284 sig_type
->per_cu
.is_debug_types
= 1;
4285 sig_type
->per_cu
.info_or_types_section
= section
;
4286 sig_type
->per_cu
.offset
= offset
;
4287 sig_type
->per_cu
.length
= length
;
4290 slot
= htab_find_slot (types_htab
,
4291 dwo_file
? (void*) dwo_tu
: (void *) sig_type
,
4293 gdb_assert (slot
!= NULL
);
4296 sect_offset dup_offset
;
4300 const struct dwo_unit
*dup_tu
= *slot
;
4302 dup_offset
= dup_tu
->offset
;
4306 const struct signatured_type
*dup_tu
= *slot
;
4308 dup_offset
= dup_tu
->per_cu
.offset
;
4311 complaint (&symfile_complaints
,
4312 _("debug type entry at offset 0x%x is duplicate to the "
4313 "entry at offset 0x%x, signature 0x%s"),
4314 offset
.sect_off
, dup_offset
.sect_off
,
4315 phex (signature
, sizeof (signature
)));
4317 *slot
= dwo_file
? (void *) dwo_tu
: (void *) sig_type
;
4319 if (dwarf2_read_debug
)
4320 fprintf_unfiltered (gdb_stdlog
, " offset 0x%x, signature 0x%s\n",
4322 phex (signature
, sizeof (signature
)));
4331 /* Create the hash table of all entries in the .debug_types section,
4332 and initialize all_type_units.
4333 The result is zero if there is an error (e.g. missing .debug_types section),
4334 otherwise non-zero. */
4337 create_all_type_units (struct objfile
*objfile
)
4340 struct signatured_type
**iter
;
4342 types_htab
= create_debug_types_hash_table (NULL
, dwarf2_per_objfile
->types
);
4343 if (types_htab
== NULL
)
4345 dwarf2_per_objfile
->signatured_types
= NULL
;
4349 dwarf2_per_objfile
->signatured_types
= types_htab
;
4351 dwarf2_per_objfile
->n_type_units
= htab_elements (types_htab
);
4352 dwarf2_per_objfile
->all_type_units
4353 = obstack_alloc (&objfile
->objfile_obstack
,
4354 dwarf2_per_objfile
->n_type_units
4355 * sizeof (struct signatured_type
*));
4356 iter
= &dwarf2_per_objfile
->all_type_units
[0];
4357 htab_traverse_noresize (types_htab
, add_signatured_type_cu_to_table
, &iter
);
4358 gdb_assert (iter
- &dwarf2_per_objfile
->all_type_units
[0]
4359 == dwarf2_per_objfile
->n_type_units
);
4364 /* Lookup a signature based type for DW_FORM_ref_sig8.
4365 Returns NULL if signature SIG is not present in the table. */
4367 static struct signatured_type
*
4368 lookup_signatured_type (ULONGEST sig
)
4370 struct signatured_type find_entry
, *entry
;
4372 if (dwarf2_per_objfile
->signatured_types
== NULL
)
4374 complaint (&symfile_complaints
,
4375 _("missing `.debug_types' section for DW_FORM_ref_sig8 die"));
4379 find_entry
.signature
= sig
;
4380 entry
= htab_find (dwarf2_per_objfile
->signatured_types
, &find_entry
);
4384 /* Low level DIE reading support. */
4386 /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */
4389 init_cu_die_reader (struct die_reader_specs
*reader
,
4390 struct dwarf2_cu
*cu
,
4391 struct dwarf2_section_info
*section
,
4392 struct dwo_file
*dwo_file
)
4394 gdb_assert (section
->readin
&& section
->buffer
!= NULL
);
4395 reader
->abfd
= section
->asection
->owner
;
4397 reader
->dwo_file
= dwo_file
;
4398 reader
->die_section
= section
;
4399 reader
->buffer
= section
->buffer
;
4400 reader
->buffer_end
= section
->buffer
+ section
->size
;
4403 /* Initialize a CU (or TU) and read its DIEs.
4404 If the CU defers to a DWO file, read the DWO file as well.
4406 ABBREV_TABLE, if non-NULL, is the abbreviation table to use.
4407 Otherwise the table specified in the comp unit header is read in and used.
4408 This is an optimization for when we already have the abbrev table.
4410 If USE_EXISTING_CU is non-zero, and THIS_CU->cu is non-NULL, then use it.
4411 Otherwise, a new CU is allocated with xmalloc.
4413 If KEEP is non-zero, then if we allocated a dwarf2_cu we add it to
4414 read_in_chain. Otherwise the dwarf2_cu data is freed at the end.
4416 WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental
4417 linker) then DIE_READER_FUNC will not get called. */
4420 init_cutu_and_read_dies (struct dwarf2_per_cu_data
*this_cu
,
4421 struct abbrev_table
*abbrev_table
,
4422 int use_existing_cu
, int keep
,
4423 die_reader_func_ftype
*die_reader_func
,
4426 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
4427 struct dwarf2_section_info
*section
= this_cu
->info_or_types_section
;
4428 bfd
*abfd
= section
->asection
->owner
;
4429 struct dwarf2_cu
*cu
;
4430 gdb_byte
*begin_info_ptr
, *info_ptr
;
4431 struct die_reader_specs reader
;
4432 struct die_info
*comp_unit_die
;
4434 struct attribute
*attr
;
4435 struct cleanup
*cleanups
, *free_cu_cleanup
= NULL
;
4436 struct signatured_type
*sig_type
= NULL
;
4437 struct dwarf2_section_info
*abbrev_section
;
4438 /* Non-zero if CU currently points to a DWO file and we need to
4439 reread it. When this happens we need to reread the skeleton die
4440 before we can reread the DWO file. */
4441 int rereading_dwo_cu
= 0;
4443 if (dwarf2_die_debug
)
4444 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset 0x%x\n",
4445 this_cu
->is_debug_types
? "type" : "comp",
4446 this_cu
->offset
.sect_off
);
4448 if (use_existing_cu
)
4451 cleanups
= make_cleanup (null_cleanup
, NULL
);
4453 /* This is cheap if the section is already read in. */
4454 dwarf2_read_section (objfile
, section
);
4456 begin_info_ptr
= info_ptr
= section
->buffer
+ this_cu
->offset
.sect_off
;
4458 abbrev_section
= get_abbrev_section_for_cu (this_cu
);
4460 if (use_existing_cu
&& this_cu
->cu
!= NULL
)
4464 /* If this CU is from a DWO file we need to start over, we need to
4465 refetch the attributes from the skeleton CU.
4466 This could be optimized by retrieving those attributes from when we
4467 were here the first time: the previous comp_unit_die was stored in
4468 comp_unit_obstack. But there's no data yet that we need this
4470 if (cu
->dwo_unit
!= NULL
)
4471 rereading_dwo_cu
= 1;
4475 /* If !use_existing_cu, this_cu->cu must be NULL. */
4476 gdb_assert (this_cu
->cu
== NULL
);
4478 cu
= xmalloc (sizeof (*cu
));
4479 init_one_comp_unit (cu
, this_cu
);
4481 /* If an error occurs while loading, release our storage. */
4482 free_cu_cleanup
= make_cleanup (free_heap_comp_unit
, cu
);
4485 if (cu
->header
.first_die_offset
.cu_off
!= 0 && ! rereading_dwo_cu
)
4487 /* We already have the header, there's no need to read it in again. */
4488 info_ptr
+= cu
->header
.first_die_offset
.cu_off
;
4492 if (this_cu
->is_debug_types
)
4495 cu_offset type_offset_in_tu
;
4497 info_ptr
= read_and_check_type_unit_head (&cu
->header
, section
,
4498 abbrev_section
, info_ptr
,
4500 &type_offset_in_tu
);
4502 /* Since per_cu is the first member of struct signatured_type,
4503 we can go from a pointer to one to a pointer to the other. */
4504 sig_type
= (struct signatured_type
*) this_cu
;
4505 gdb_assert (sig_type
->signature
== signature
);
4506 gdb_assert (sig_type
->type_offset_in_tu
.cu_off
4507 == type_offset_in_tu
.cu_off
);
4508 gdb_assert (this_cu
->offset
.sect_off
== cu
->header
.offset
.sect_off
);
4510 /* LENGTH has not been set yet for type units if we're
4511 using .gdb_index. */
4512 this_cu
->length
= get_cu_length (&cu
->header
);
4514 /* Establish the type offset that can be used to lookup the type. */
4515 sig_type
->type_offset_in_section
.sect_off
=
4516 this_cu
->offset
.sect_off
+ sig_type
->type_offset_in_tu
.cu_off
;
4520 info_ptr
= read_and_check_comp_unit_head (&cu
->header
, section
,
4524 gdb_assert (this_cu
->offset
.sect_off
== cu
->header
.offset
.sect_off
);
4525 gdb_assert (this_cu
->length
== get_cu_length (&cu
->header
));
4529 /* Skip dummy compilation units. */
4530 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
4531 || peek_abbrev_code (abfd
, info_ptr
) == 0)
4533 do_cleanups (cleanups
);
4537 /* If we don't have them yet, read the abbrevs for this compilation unit.
4538 And if we need to read them now, make sure they're freed when we're
4539 done. Note that it's important that if the CU had an abbrev table
4540 on entry we don't free it when we're done: Somewhere up the call stack
4541 it may be in use. */
4542 if (abbrev_table
!= NULL
)
4544 gdb_assert (cu
->abbrev_table
== NULL
);
4545 gdb_assert (cu
->header
.abbrev_offset
.sect_off
4546 == abbrev_table
->offset
.sect_off
);
4547 cu
->abbrev_table
= abbrev_table
;
4549 else if (cu
->abbrev_table
== NULL
)
4551 dwarf2_read_abbrevs (cu
, abbrev_section
);
4552 make_cleanup (dwarf2_free_abbrev_table
, cu
);
4554 else if (rereading_dwo_cu
)
4556 dwarf2_free_abbrev_table (cu
);
4557 dwarf2_read_abbrevs (cu
, abbrev_section
);
4560 /* Read the top level CU/TU die. */
4561 init_cu_die_reader (&reader
, cu
, section
, NULL
);
4562 info_ptr
= read_full_die (&reader
, &comp_unit_die
, info_ptr
, &has_children
);
4564 /* If we have a DWO stub, process it and then read in the DWO file.
4565 Note that if USE_EXISTING_OK != 0, and THIS_CU->cu already contains
4566 a DWO CU, that this test will fail. */
4567 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_name
, cu
);
4570 const char *dwo_name
= DW_STRING (attr
);
4571 const char *comp_dir_string
;
4572 struct dwo_unit
*dwo_unit
;
4573 ULONGEST signature
; /* Or dwo_id. */
4574 struct attribute
*comp_dir
, *stmt_list
, *low_pc
, *high_pc
, *ranges
;
4575 int i
,num_extra_attrs
;
4576 struct dwarf2_section_info
*dwo_abbrev_section
;
4579 error (_("Dwarf Error: compilation unit with DW_AT_GNU_dwo_name"
4580 " has children (offset 0x%x) [in module %s]"),
4581 this_cu
->offset
.sect_off
, bfd_get_filename (abfd
));
4583 /* These attributes aren't processed until later:
4584 DW_AT_stmt_list, DW_AT_low_pc, DW_AT_high_pc, DW_AT_ranges.
4585 However, the attribute is found in the stub which we won't have later.
4586 In order to not impose this complication on the rest of the code,
4587 we read them here and copy them to the DWO CU/TU die. */
4589 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
4592 if (! this_cu
->is_debug_types
)
4593 stmt_list
= dwarf2_attr (comp_unit_die
, DW_AT_stmt_list
, cu
);
4594 low_pc
= dwarf2_attr (comp_unit_die
, DW_AT_low_pc
, cu
);
4595 high_pc
= dwarf2_attr (comp_unit_die
, DW_AT_high_pc
, cu
);
4596 ranges
= dwarf2_attr (comp_unit_die
, DW_AT_ranges
, cu
);
4597 comp_dir
= dwarf2_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
4599 /* There should be a DW_AT_addr_base attribute here (if needed).
4600 We need the value before we can process DW_FORM_GNU_addr_index. */
4602 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_addr_base
, cu
);
4604 cu
->addr_base
= DW_UNSND (attr
);
4606 /* There should be a DW_AT_ranges_base attribute here (if needed).
4607 We need the value before we can process DW_AT_ranges. */
4608 cu
->ranges_base
= 0;
4609 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_ranges_base
, cu
);
4611 cu
->ranges_base
= DW_UNSND (attr
);
4613 if (this_cu
->is_debug_types
)
4615 gdb_assert (sig_type
!= NULL
);
4616 signature
= sig_type
->signature
;
4620 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_id
, cu
);
4622 error (_("Dwarf Error: missing dwo_id [in module %s]"),
4624 signature
= DW_UNSND (attr
);
4627 /* We may need the comp_dir in order to find the DWO file. */
4628 comp_dir_string
= NULL
;
4630 comp_dir_string
= DW_STRING (comp_dir
);
4632 if (this_cu
->is_debug_types
)
4633 dwo_unit
= lookup_dwo_type_unit (sig_type
, dwo_name
, comp_dir_string
);
4635 dwo_unit
= lookup_dwo_comp_unit (this_cu
, dwo_name
, comp_dir_string
,
4638 if (dwo_unit
== NULL
)
4640 error (_("Dwarf Error: CU at offset 0x%x references unknown DWO"
4641 " with ID %s [in module %s]"),
4642 this_cu
->offset
.sect_off
,
4643 phex (signature
, sizeof (signature
)),
4647 /* Set up for reading the DWO CU/TU. */
4648 cu
->dwo_unit
= dwo_unit
;
4649 section
= dwo_unit
->info_or_types_section
;
4650 dwarf2_read_section (objfile
, section
);
4651 begin_info_ptr
= info_ptr
= section
->buffer
+ dwo_unit
->offset
.sect_off
;
4652 dwo_abbrev_section
= &dwo_unit
->dwo_file
->sections
.abbrev
;
4653 init_cu_die_reader (&reader
, cu
, section
, dwo_unit
->dwo_file
);
4655 if (this_cu
->is_debug_types
)
4658 cu_offset type_offset_in_tu
;
4660 info_ptr
= read_and_check_type_unit_head (&cu
->header
, section
,
4664 &type_offset_in_tu
);
4665 gdb_assert (sig_type
->signature
== signature
);
4666 gdb_assert (dwo_unit
->offset
.sect_off
== cu
->header
.offset
.sect_off
);
4667 /* For DWOs coming from DWP files, we don't know the CU length
4668 nor the type's offset in the TU until now. */
4669 dwo_unit
->length
= get_cu_length (&cu
->header
);
4670 dwo_unit
->type_offset_in_tu
= type_offset_in_tu
;
4672 /* Establish the type offset that can be used to lookup the type.
4673 For DWO files, we don't know it until now. */
4674 sig_type
->type_offset_in_section
.sect_off
=
4675 dwo_unit
->offset
.sect_off
+ dwo_unit
->type_offset_in_tu
.cu_off
;
4679 info_ptr
= read_and_check_comp_unit_head (&cu
->header
, section
,
4682 gdb_assert (dwo_unit
->offset
.sect_off
== cu
->header
.offset
.sect_off
);
4683 /* For DWOs coming from DWP files, we don't know the CU length
4685 dwo_unit
->length
= get_cu_length (&cu
->header
);
4688 /* Discard the original CU's abbrev table, and read the DWO's. */
4689 if (abbrev_table
== NULL
)
4691 dwarf2_free_abbrev_table (cu
);
4692 dwarf2_read_abbrevs (cu
, dwo_abbrev_section
);
4696 dwarf2_read_abbrevs (cu
, dwo_abbrev_section
);
4697 make_cleanup (dwarf2_free_abbrev_table
, cu
);
4700 /* Read in the die, but leave space to copy over the attributes
4701 from the stub. This has the benefit of simplifying the rest of
4702 the code - all the real work is done here. */
4703 num_extra_attrs
= ((stmt_list
!= NULL
)
4707 + (comp_dir
!= NULL
));
4708 info_ptr
= read_full_die_1 (&reader
, &comp_unit_die
, info_ptr
,
4709 &has_children
, num_extra_attrs
);
4711 /* Copy over the attributes from the stub to the DWO die. */
4712 i
= comp_unit_die
->num_attrs
;
4713 if (stmt_list
!= NULL
)
4714 comp_unit_die
->attrs
[i
++] = *stmt_list
;
4716 comp_unit_die
->attrs
[i
++] = *low_pc
;
4717 if (high_pc
!= NULL
)
4718 comp_unit_die
->attrs
[i
++] = *high_pc
;
4720 comp_unit_die
->attrs
[i
++] = *ranges
;
4721 if (comp_dir
!= NULL
)
4722 comp_unit_die
->attrs
[i
++] = *comp_dir
;
4723 comp_unit_die
->num_attrs
+= num_extra_attrs
;
4725 /* Skip dummy compilation units. */
4726 if (info_ptr
>= begin_info_ptr
+ dwo_unit
->length
4727 || peek_abbrev_code (abfd
, info_ptr
) == 0)
4729 do_cleanups (cleanups
);
4734 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
4736 if (free_cu_cleanup
!= NULL
)
4740 /* We've successfully allocated this compilation unit. Let our
4741 caller clean it up when finished with it. */
4742 discard_cleanups (free_cu_cleanup
);
4744 /* We can only discard free_cu_cleanup and all subsequent cleanups.
4745 So we have to manually free the abbrev table. */
4746 dwarf2_free_abbrev_table (cu
);
4748 /* Link this CU into read_in_chain. */
4749 this_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
4750 dwarf2_per_objfile
->read_in_chain
= this_cu
;
4753 do_cleanups (free_cu_cleanup
);
4756 do_cleanups (cleanups
);
4759 /* Read CU/TU THIS_CU in section SECTION,
4760 but do not follow DW_AT_GNU_dwo_name if present.
4761 DWOP_FILE, if non-NULL, is the DWO/DWP file to read (the caller is assumed
4762 to have already done the lookup to find the DWO/DWP file).
4764 The caller is required to fill in THIS_CU->section, THIS_CU->offset, and
4765 THIS_CU->is_debug_types, but nothing else.
4767 We fill in THIS_CU->length.
4769 WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental
4770 linker) then DIE_READER_FUNC will not get called.
4772 THIS_CU->cu is always freed when done.
4773 This is done in order to not leave THIS_CU->cu in a state where we have
4774 to care whether it refers to the "main" CU or the DWO CU. */
4777 init_cutu_and_read_dies_no_follow (struct dwarf2_per_cu_data
*this_cu
,
4778 struct dwarf2_section_info
*abbrev_section
,
4779 struct dwo_file
*dwo_file
,
4780 die_reader_func_ftype
*die_reader_func
,
4783 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
4784 struct dwarf2_section_info
*section
= this_cu
->info_or_types_section
;
4785 bfd
*abfd
= section
->asection
->owner
;
4786 struct dwarf2_cu cu
;
4787 gdb_byte
*begin_info_ptr
, *info_ptr
;
4788 struct die_reader_specs reader
;
4789 struct cleanup
*cleanups
;
4790 struct die_info
*comp_unit_die
;
4793 if (dwarf2_die_debug
)
4794 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset 0x%x\n",
4795 this_cu
->is_debug_types
? "type" : "comp",
4796 this_cu
->offset
.sect_off
);
4798 gdb_assert (this_cu
->cu
== NULL
);
4800 /* This is cheap if the section is already read in. */
4801 dwarf2_read_section (objfile
, section
);
4803 init_one_comp_unit (&cu
, this_cu
);
4805 cleanups
= make_cleanup (free_stack_comp_unit
, &cu
);
4807 begin_info_ptr
= info_ptr
= section
->buffer
+ this_cu
->offset
.sect_off
;
4808 info_ptr
= read_and_check_comp_unit_head (&cu
.header
, section
,
4809 abbrev_section
, info_ptr
,
4810 this_cu
->is_debug_types
);
4812 this_cu
->length
= get_cu_length (&cu
.header
);
4814 /* Skip dummy compilation units. */
4815 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
4816 || peek_abbrev_code (abfd
, info_ptr
) == 0)
4818 do_cleanups (cleanups
);
4822 dwarf2_read_abbrevs (&cu
, abbrev_section
);
4823 make_cleanup (dwarf2_free_abbrev_table
, &cu
);
4825 init_cu_die_reader (&reader
, &cu
, section
, dwo_file
);
4826 info_ptr
= read_full_die (&reader
, &comp_unit_die
, info_ptr
, &has_children
);
4828 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
4830 do_cleanups (cleanups
);
4833 /* Read a CU/TU, except that this does not look for DW_AT_GNU_dwo_name and
4834 does not lookup the specified DWO file.
4835 This cannot be used to read DWO files.
4837 THIS_CU->cu is always freed when done.
4838 This is done in order to not leave THIS_CU->cu in a state where we have
4839 to care whether it refers to the "main" CU or the DWO CU.
4840 We can revisit this if the data shows there's a performance issue. */
4843 init_cutu_and_read_dies_simple (struct dwarf2_per_cu_data
*this_cu
,
4844 die_reader_func_ftype
*die_reader_func
,
4847 init_cutu_and_read_dies_no_follow (this_cu
,
4848 get_abbrev_section_for_cu (this_cu
),
4850 die_reader_func
, data
);
4853 /* Create a psymtab named NAME and assign it to PER_CU.
4855 The caller must fill in the following details:
4856 dirname, textlow, texthigh. */
4858 static struct partial_symtab
*
4859 create_partial_symtab (struct dwarf2_per_cu_data
*per_cu
, const char *name
)
4861 struct objfile
*objfile
= per_cu
->objfile
;
4862 struct partial_symtab
*pst
;
4864 pst
= start_psymtab_common (objfile
, objfile
->section_offsets
,
4866 objfile
->global_psymbols
.next
,
4867 objfile
->static_psymbols
.next
);
4869 pst
->psymtabs_addrmap_supported
= 1;
4871 /* This is the glue that links PST into GDB's symbol API. */
4872 pst
->read_symtab_private
= per_cu
;
4873 pst
->read_symtab
= dwarf2_read_symtab
;
4874 per_cu
->v
.psymtab
= pst
;
4879 /* die_reader_func for process_psymtab_comp_unit. */
4882 process_psymtab_comp_unit_reader (const struct die_reader_specs
*reader
,
4884 struct die_info
*comp_unit_die
,
4888 struct dwarf2_cu
*cu
= reader
->cu
;
4889 struct objfile
*objfile
= cu
->objfile
;
4890 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
4891 struct attribute
*attr
;
4893 CORE_ADDR best_lowpc
= 0, best_highpc
= 0;
4894 struct partial_symtab
*pst
;
4896 const char *filename
;
4897 int *want_partial_unit_ptr
= data
;
4899 if (comp_unit_die
->tag
== DW_TAG_partial_unit
4900 && (want_partial_unit_ptr
== NULL
4901 || !*want_partial_unit_ptr
))
4904 gdb_assert (! per_cu
->is_debug_types
);
4906 prepare_one_comp_unit (cu
, comp_unit_die
, language_minimal
);
4908 cu
->list_in_scope
= &file_symbols
;
4910 /* Allocate a new partial symbol table structure. */
4911 attr
= dwarf2_attr (comp_unit_die
, DW_AT_name
, cu
);
4912 if (attr
== NULL
|| !DW_STRING (attr
))
4915 filename
= DW_STRING (attr
);
4917 pst
= create_partial_symtab (per_cu
, filename
);
4919 /* This must be done before calling dwarf2_build_include_psymtabs. */
4920 attr
= dwarf2_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
4922 pst
->dirname
= DW_STRING (attr
);
4924 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
4926 dwarf2_find_base_address (comp_unit_die
, cu
);
4928 /* Possibly set the default values of LOWPC and HIGHPC from
4930 has_pc_info
= dwarf2_get_pc_bounds (comp_unit_die
, &best_lowpc
,
4931 &best_highpc
, cu
, pst
);
4932 if (has_pc_info
== 1 && best_lowpc
< best_highpc
)
4933 /* Store the contiguous range if it is not empty; it can be empty for
4934 CUs with no code. */
4935 addrmap_set_empty (objfile
->psymtabs_addrmap
,
4936 best_lowpc
+ baseaddr
,
4937 best_highpc
+ baseaddr
- 1, pst
);
4939 /* Check if comp unit has_children.
4940 If so, read the rest of the partial symbols from this comp unit.
4941 If not, there's no more debug_info for this comp unit. */
4944 struct partial_die_info
*first_die
;
4945 CORE_ADDR lowpc
, highpc
;
4947 lowpc
= ((CORE_ADDR
) -1);
4948 highpc
= ((CORE_ADDR
) 0);
4950 first_die
= load_partial_dies (reader
, info_ptr
, 1);
4952 scan_partial_symbols (first_die
, &lowpc
, &highpc
,
4955 /* If we didn't find a lowpc, set it to highpc to avoid
4956 complaints from `maint check'. */
4957 if (lowpc
== ((CORE_ADDR
) -1))
4960 /* If the compilation unit didn't have an explicit address range,
4961 then use the information extracted from its child dies. */
4965 best_highpc
= highpc
;
4968 pst
->textlow
= best_lowpc
+ baseaddr
;
4969 pst
->texthigh
= best_highpc
+ baseaddr
;
4971 pst
->n_global_syms
= objfile
->global_psymbols
.next
-
4972 (objfile
->global_psymbols
.list
+ pst
->globals_offset
);
4973 pst
->n_static_syms
= objfile
->static_psymbols
.next
-
4974 (objfile
->static_psymbols
.list
+ pst
->statics_offset
);
4975 sort_pst_symbols (objfile
, pst
);
4977 if (!VEC_empty (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
))
4980 int len
= VEC_length (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
);
4981 struct dwarf2_per_cu_data
*iter
;
4983 /* Fill in 'dependencies' here; we fill in 'users' in a
4985 pst
->number_of_dependencies
= len
;
4986 pst
->dependencies
= obstack_alloc (&objfile
->objfile_obstack
,
4987 len
* sizeof (struct symtab
*));
4989 VEC_iterate (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
,
4992 pst
->dependencies
[i
] = iter
->v
.psymtab
;
4994 VEC_free (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
);
4997 /* Get the list of files included in the current compilation unit,
4998 and build a psymtab for each of them. */
4999 dwarf2_build_include_psymtabs (cu
, comp_unit_die
, pst
);
5001 if (dwarf2_read_debug
)
5003 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
5005 fprintf_unfiltered (gdb_stdlog
,
5006 "Psymtab for %s unit @0x%x: %s - %s"
5007 ", %d global, %d static syms\n",
5008 per_cu
->is_debug_types
? "type" : "comp",
5009 per_cu
->offset
.sect_off
,
5010 paddress (gdbarch
, pst
->textlow
),
5011 paddress (gdbarch
, pst
->texthigh
),
5012 pst
->n_global_syms
, pst
->n_static_syms
);
5016 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
5017 Process compilation unit THIS_CU for a psymtab. */
5020 process_psymtab_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
5021 int want_partial_unit
)
5023 /* If this compilation unit was already read in, free the
5024 cached copy in order to read it in again. This is
5025 necessary because we skipped some symbols when we first
5026 read in the compilation unit (see load_partial_dies).
5027 This problem could be avoided, but the benefit is unclear. */
5028 if (this_cu
->cu
!= NULL
)
5029 free_one_cached_comp_unit (this_cu
);
5031 gdb_assert (! this_cu
->is_debug_types
);
5032 init_cutu_and_read_dies (this_cu
, NULL
, 0, 0,
5033 process_psymtab_comp_unit_reader
,
5034 &want_partial_unit
);
5036 /* Age out any secondary CUs. */
5037 age_cached_comp_units ();
5041 hash_type_unit_group (const void *item
)
5043 const struct type_unit_group
*tu_group
= item
;
5045 return hash_stmt_list_entry (&tu_group
->hash
);
5049 eq_type_unit_group (const void *item_lhs
, const void *item_rhs
)
5051 const struct type_unit_group
*lhs
= item_lhs
;
5052 const struct type_unit_group
*rhs
= item_rhs
;
5054 return eq_stmt_list_entry (&lhs
->hash
, &rhs
->hash
);
5057 /* Allocate a hash table for type unit groups. */
5060 allocate_type_unit_groups_table (void)
5062 return htab_create_alloc_ex (3,
5063 hash_type_unit_group
,
5066 &dwarf2_per_objfile
->objfile
->objfile_obstack
,
5067 hashtab_obstack_allocate
,
5068 dummy_obstack_deallocate
);
5071 /* Type units that don't have DW_AT_stmt_list are grouped into their own
5072 partial symtabs. We combine several TUs per psymtab to not let the size
5073 of any one psymtab grow too big. */
5074 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB (1 << 31)
5075 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE 10
5077 /* Helper routine for get_type_unit_group.
5078 Create the type_unit_group object used to hold one or more TUs. */
5080 static struct type_unit_group
*
5081 create_type_unit_group (struct dwarf2_cu
*cu
, sect_offset line_offset_struct
)
5083 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5084 struct dwarf2_per_cu_data
*per_cu
;
5085 struct type_unit_group
*tu_group
;
5087 tu_group
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
5088 struct type_unit_group
);
5089 per_cu
= &tu_group
->per_cu
;
5090 per_cu
->objfile
= objfile
;
5091 per_cu
->is_debug_types
= 1;
5092 per_cu
->type_unit_group
= tu_group
;
5094 if (dwarf2_per_objfile
->using_index
)
5096 per_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
5097 struct dwarf2_per_cu_quick_data
);
5098 tu_group
->t
.first_tu
= cu
->per_cu
;
5102 unsigned int line_offset
= line_offset_struct
.sect_off
;
5103 struct partial_symtab
*pst
;
5106 /* Give the symtab a useful name for debug purposes. */
5107 if ((line_offset
& NO_STMT_LIST_TYPE_UNIT_PSYMTAB
) != 0)
5108 name
= xstrprintf ("<type_units_%d>",
5109 (line_offset
& ~NO_STMT_LIST_TYPE_UNIT_PSYMTAB
));
5111 name
= xstrprintf ("<type_units_at_0x%x>", line_offset
);
5113 pst
= create_partial_symtab (per_cu
, name
);
5119 tu_group
->hash
.dwo_unit
= cu
->dwo_unit
;
5120 tu_group
->hash
.line_offset
= line_offset_struct
;
5125 /* Look up the type_unit_group for type unit CU, and create it if necessary.
5126 STMT_LIST is a DW_AT_stmt_list attribute. */
5128 static struct type_unit_group
*
5129 get_type_unit_group (struct dwarf2_cu
*cu
, struct attribute
*stmt_list
)
5131 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
5132 struct type_unit_group
*tu_group
;
5134 unsigned int line_offset
;
5135 struct type_unit_group type_unit_group_for_lookup
;
5137 if (dwarf2_per_objfile
->type_unit_groups
== NULL
)
5139 dwarf2_per_objfile
->type_unit_groups
=
5140 allocate_type_unit_groups_table ();
5143 /* Do we need to create a new group, or can we use an existing one? */
5147 line_offset
= DW_UNSND (stmt_list
);
5148 ++tu_stats
->nr_symtab_sharers
;
5152 /* Ugh, no stmt_list. Rare, but we have to handle it.
5153 We can do various things here like create one group per TU or
5154 spread them over multiple groups to split up the expansion work.
5155 To avoid worst case scenarios (too many groups or too large groups)
5156 we, umm, group them in bunches. */
5157 line_offset
= (NO_STMT_LIST_TYPE_UNIT_PSYMTAB
5158 | (tu_stats
->nr_stmt_less_type_units
5159 / NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE
));
5160 ++tu_stats
->nr_stmt_less_type_units
;
5163 type_unit_group_for_lookup
.hash
.dwo_unit
= cu
->dwo_unit
;
5164 type_unit_group_for_lookup
.hash
.line_offset
.sect_off
= line_offset
;
5165 slot
= htab_find_slot (dwarf2_per_objfile
->type_unit_groups
,
5166 &type_unit_group_for_lookup
, INSERT
);
5170 gdb_assert (tu_group
!= NULL
);
5174 sect_offset line_offset_struct
;
5176 line_offset_struct
.sect_off
= line_offset
;
5177 tu_group
= create_type_unit_group (cu
, line_offset_struct
);
5179 ++tu_stats
->nr_symtabs
;
5185 /* Struct used to sort TUs by their abbreviation table offset. */
5187 struct tu_abbrev_offset
5189 struct signatured_type
*sig_type
;
5190 sect_offset abbrev_offset
;
5193 /* Helper routine for build_type_unit_groups, passed to qsort. */
5196 sort_tu_by_abbrev_offset (const void *ap
, const void *bp
)
5198 const struct tu_abbrev_offset
* const *a
= ap
;
5199 const struct tu_abbrev_offset
* const *b
= bp
;
5200 unsigned int aoff
= (*a
)->abbrev_offset
.sect_off
;
5201 unsigned int boff
= (*b
)->abbrev_offset
.sect_off
;
5203 return (aoff
> boff
) - (aoff
< boff
);
5206 /* A helper function to add a type_unit_group to a table. */
5209 add_type_unit_group_to_table (void **slot
, void *datum
)
5211 struct type_unit_group
*tu_group
= *slot
;
5212 struct type_unit_group
***datap
= datum
;
5220 /* Efficiently read all the type units, calling init_cutu_and_read_dies on
5221 each one passing FUNC,DATA.
5223 The efficiency is because we sort TUs by the abbrev table they use and
5224 only read each abbrev table once. In one program there are 200K TUs
5225 sharing 8K abbrev tables.
5227 The main purpose of this function is to support building the
5228 dwarf2_per_objfile->type_unit_groups table.
5229 TUs typically share the DW_AT_stmt_list of the CU they came from, so we
5230 can collapse the search space by grouping them by stmt_list.
5231 The savings can be significant, in the same program from above the 200K TUs
5232 share 8K stmt_list tables.
5234 FUNC is expected to call get_type_unit_group, which will create the
5235 struct type_unit_group if necessary and add it to
5236 dwarf2_per_objfile->type_unit_groups. */
5239 build_type_unit_groups (die_reader_func_ftype
*func
, void *data
)
5241 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5242 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
5243 struct cleanup
*cleanups
;
5244 struct abbrev_table
*abbrev_table
;
5245 sect_offset abbrev_offset
;
5246 struct tu_abbrev_offset
*sorted_by_abbrev
;
5247 struct type_unit_group
**iter
;
5250 /* It's up to the caller to not call us multiple times. */
5251 gdb_assert (dwarf2_per_objfile
->type_unit_groups
== NULL
);
5253 if (dwarf2_per_objfile
->n_type_units
== 0)
5256 /* TUs typically share abbrev tables, and there can be way more TUs than
5257 abbrev tables. Sort by abbrev table to reduce the number of times we
5258 read each abbrev table in.
5259 Alternatives are to punt or to maintain a cache of abbrev tables.
5260 This is simpler and efficient enough for now.
5262 Later we group TUs by their DW_AT_stmt_list value (as this defines the
5263 symtab to use). Typically TUs with the same abbrev offset have the same
5264 stmt_list value too so in practice this should work well.
5266 The basic algorithm here is:
5268 sort TUs by abbrev table
5269 for each TU with same abbrev table:
5270 read abbrev table if first user
5271 read TU top level DIE
5272 [IWBN if DWO skeletons had DW_AT_stmt_list]
5275 if (dwarf2_read_debug
)
5276 fprintf_unfiltered (gdb_stdlog
, "Building type unit groups ...\n");
5278 /* Sort in a separate table to maintain the order of all_type_units
5279 for .gdb_index: TU indices directly index all_type_units. */
5280 sorted_by_abbrev
= XNEWVEC (struct tu_abbrev_offset
,
5281 dwarf2_per_objfile
->n_type_units
);
5282 for (i
= 0; i
< dwarf2_per_objfile
->n_type_units
; ++i
)
5284 struct signatured_type
*sig_type
= dwarf2_per_objfile
->all_type_units
[i
];
5286 sorted_by_abbrev
[i
].sig_type
= sig_type
;
5287 sorted_by_abbrev
[i
].abbrev_offset
=
5288 read_abbrev_offset (sig_type
->per_cu
.info_or_types_section
,
5289 sig_type
->per_cu
.offset
);
5291 cleanups
= make_cleanup (xfree
, sorted_by_abbrev
);
5292 qsort (sorted_by_abbrev
, dwarf2_per_objfile
->n_type_units
,
5293 sizeof (struct tu_abbrev_offset
), sort_tu_by_abbrev_offset
);
5295 /* Note: In the .gdb_index case, get_type_unit_group may have already been
5296 called any number of times, so we don't reset tu_stats here. */
5298 abbrev_offset
.sect_off
= ~(unsigned) 0;
5299 abbrev_table
= NULL
;
5300 make_cleanup (abbrev_table_free_cleanup
, &abbrev_table
);
5302 for (i
= 0; i
< dwarf2_per_objfile
->n_type_units
; ++i
)
5304 const struct tu_abbrev_offset
*tu
= &sorted_by_abbrev
[i
];
5306 /* Switch to the next abbrev table if necessary. */
5307 if (abbrev_table
== NULL
5308 || tu
->abbrev_offset
.sect_off
!= abbrev_offset
.sect_off
)
5310 if (abbrev_table
!= NULL
)
5312 abbrev_table_free (abbrev_table
);
5313 /* Reset to NULL in case abbrev_table_read_table throws
5314 an error: abbrev_table_free_cleanup will get called. */
5315 abbrev_table
= NULL
;
5317 abbrev_offset
= tu
->abbrev_offset
;
5319 abbrev_table_read_table (&dwarf2_per_objfile
->abbrev
,
5321 ++tu_stats
->nr_uniq_abbrev_tables
;
5324 init_cutu_and_read_dies (&tu
->sig_type
->per_cu
, abbrev_table
, 0, 0,
5328 /* Create a vector of pointers to primary type units to make it easy to
5329 iterate over them and CUs. See dw2_get_primary_cu. */
5330 dwarf2_per_objfile
->n_type_unit_groups
=
5331 htab_elements (dwarf2_per_objfile
->type_unit_groups
);
5332 dwarf2_per_objfile
->all_type_unit_groups
=
5333 obstack_alloc (&objfile
->objfile_obstack
,
5334 dwarf2_per_objfile
->n_type_unit_groups
5335 * sizeof (struct type_unit_group
*));
5336 iter
= &dwarf2_per_objfile
->all_type_unit_groups
[0];
5337 htab_traverse_noresize (dwarf2_per_objfile
->type_unit_groups
,
5338 add_type_unit_group_to_table
, &iter
);
5339 gdb_assert (iter
- &dwarf2_per_objfile
->all_type_unit_groups
[0]
5340 == dwarf2_per_objfile
->n_type_unit_groups
);
5342 do_cleanups (cleanups
);
5344 if (dwarf2_read_debug
)
5346 fprintf_unfiltered (gdb_stdlog
, "Done building type unit groups:\n");
5347 fprintf_unfiltered (gdb_stdlog
, " %d TUs\n",
5348 dwarf2_per_objfile
->n_type_units
);
5349 fprintf_unfiltered (gdb_stdlog
, " %d uniq abbrev tables\n",
5350 tu_stats
->nr_uniq_abbrev_tables
);
5351 fprintf_unfiltered (gdb_stdlog
, " %d symtabs from stmt_list entries\n",
5352 tu_stats
->nr_symtabs
);
5353 fprintf_unfiltered (gdb_stdlog
, " %d symtab sharers\n",
5354 tu_stats
->nr_symtab_sharers
);
5355 fprintf_unfiltered (gdb_stdlog
, " %d type units without a stmt_list\n",
5356 tu_stats
->nr_stmt_less_type_units
);
5360 /* Reader function for build_type_psymtabs. */
5363 build_type_psymtabs_reader (const struct die_reader_specs
*reader
,
5365 struct die_info
*type_unit_die
,
5369 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5370 struct dwarf2_cu
*cu
= reader
->cu
;
5371 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
5372 struct type_unit_group
*tu_group
;
5373 struct attribute
*attr
;
5374 struct partial_die_info
*first_die
;
5375 CORE_ADDR lowpc
, highpc
;
5376 struct partial_symtab
*pst
;
5378 gdb_assert (data
== NULL
);
5383 attr
= dwarf2_attr_no_follow (type_unit_die
, DW_AT_stmt_list
);
5384 tu_group
= get_type_unit_group (cu
, attr
);
5386 VEC_safe_push (dwarf2_per_cu_ptr
, tu_group
->t
.tus
, per_cu
);
5388 prepare_one_comp_unit (cu
, type_unit_die
, language_minimal
);
5389 cu
->list_in_scope
= &file_symbols
;
5390 pst
= create_partial_symtab (per_cu
, "");
5393 first_die
= load_partial_dies (reader
, info_ptr
, 1);
5395 lowpc
= (CORE_ADDR
) -1;
5396 highpc
= (CORE_ADDR
) 0;
5397 scan_partial_symbols (first_die
, &lowpc
, &highpc
, 0, cu
);
5399 pst
->n_global_syms
= objfile
->global_psymbols
.next
-
5400 (objfile
->global_psymbols
.list
+ pst
->globals_offset
);
5401 pst
->n_static_syms
= objfile
->static_psymbols
.next
-
5402 (objfile
->static_psymbols
.list
+ pst
->statics_offset
);
5403 sort_pst_symbols (objfile
, pst
);
5406 /* Traversal function for build_type_psymtabs. */
5409 build_type_psymtab_dependencies (void **slot
, void *info
)
5411 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5412 struct type_unit_group
*tu_group
= (struct type_unit_group
*) *slot
;
5413 struct dwarf2_per_cu_data
*per_cu
= &tu_group
->per_cu
;
5414 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
5415 int len
= VEC_length (dwarf2_per_cu_ptr
, tu_group
->t
.tus
);
5416 struct dwarf2_per_cu_data
*iter
;
5419 gdb_assert (len
> 0);
5421 pst
->number_of_dependencies
= len
;
5422 pst
->dependencies
= obstack_alloc (&objfile
->objfile_obstack
,
5423 len
* sizeof (struct psymtab
*));
5425 VEC_iterate (dwarf2_per_cu_ptr
, tu_group
->t
.tus
, i
, iter
);
5428 pst
->dependencies
[i
] = iter
->v
.psymtab
;
5429 iter
->type_unit_group
= tu_group
;
5432 VEC_free (dwarf2_per_cu_ptr
, tu_group
->t
.tus
);
5437 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
5438 Build partial symbol tables for the .debug_types comp-units. */
5441 build_type_psymtabs (struct objfile
*objfile
)
5443 if (! create_all_type_units (objfile
))
5446 build_type_unit_groups (build_type_psymtabs_reader
, NULL
);
5448 /* Now that all TUs have been processed we can fill in the dependencies. */
5449 htab_traverse_noresize (dwarf2_per_objfile
->type_unit_groups
,
5450 build_type_psymtab_dependencies
, NULL
);
5453 /* A cleanup function that clears objfile's psymtabs_addrmap field. */
5456 psymtabs_addrmap_cleanup (void *o
)
5458 struct objfile
*objfile
= o
;
5460 objfile
->psymtabs_addrmap
= NULL
;
5463 /* Compute the 'user' field for each psymtab in OBJFILE. */
5466 set_partial_user (struct objfile
*objfile
)
5470 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
5472 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
5473 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
5479 for (j
= 0; j
< pst
->number_of_dependencies
; ++j
)
5481 /* Set the 'user' field only if it is not already set. */
5482 if (pst
->dependencies
[j
]->user
== NULL
)
5483 pst
->dependencies
[j
]->user
= pst
;
5488 /* Build the partial symbol table by doing a quick pass through the
5489 .debug_info and .debug_abbrev sections. */
5492 dwarf2_build_psymtabs_hard (struct objfile
*objfile
)
5494 struct cleanup
*back_to
, *addrmap_cleanup
;
5495 struct obstack temp_obstack
;
5498 if (dwarf2_read_debug
)
5500 fprintf_unfiltered (gdb_stdlog
, "Building psymtabs of objfile %s ...\n",
5504 dwarf2_per_objfile
->reading_partial_symbols
= 1;
5506 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->info
);
5508 /* Any cached compilation units will be linked by the per-objfile
5509 read_in_chain. Make sure to free them when we're done. */
5510 back_to
= make_cleanup (free_cached_comp_units
, NULL
);
5512 build_type_psymtabs (objfile
);
5514 create_all_comp_units (objfile
);
5516 /* Create a temporary address map on a temporary obstack. We later
5517 copy this to the final obstack. */
5518 obstack_init (&temp_obstack
);
5519 make_cleanup_obstack_free (&temp_obstack
);
5520 objfile
->psymtabs_addrmap
= addrmap_create_mutable (&temp_obstack
);
5521 addrmap_cleanup
= make_cleanup (psymtabs_addrmap_cleanup
, objfile
);
5523 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
5525 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
5527 process_psymtab_comp_unit (per_cu
, 0);
5530 set_partial_user (objfile
);
5532 objfile
->psymtabs_addrmap
= addrmap_create_fixed (objfile
->psymtabs_addrmap
,
5533 &objfile
->objfile_obstack
);
5534 discard_cleanups (addrmap_cleanup
);
5536 do_cleanups (back_to
);
5538 if (dwarf2_read_debug
)
5539 fprintf_unfiltered (gdb_stdlog
, "Done building psymtabs of %s\n",
5543 /* die_reader_func for load_partial_comp_unit. */
5546 load_partial_comp_unit_reader (const struct die_reader_specs
*reader
,
5548 struct die_info
*comp_unit_die
,
5552 struct dwarf2_cu
*cu
= reader
->cu
;
5554 prepare_one_comp_unit (cu
, comp_unit_die
, language_minimal
);
5556 /* Check if comp unit has_children.
5557 If so, read the rest of the partial symbols from this comp unit.
5558 If not, there's no more debug_info for this comp unit. */
5560 load_partial_dies (reader
, info_ptr
, 0);
5563 /* Load the partial DIEs for a secondary CU into memory.
5564 This is also used when rereading a primary CU with load_all_dies. */
5567 load_partial_comp_unit (struct dwarf2_per_cu_data
*this_cu
)
5569 init_cutu_and_read_dies (this_cu
, NULL
, 1, 1,
5570 load_partial_comp_unit_reader
, NULL
);
5574 read_comp_units_from_section (struct objfile
*objfile
,
5575 struct dwarf2_section_info
*section
,
5576 unsigned int is_dwz
,
5579 struct dwarf2_per_cu_data
***all_comp_units
)
5582 bfd
*abfd
= section
->asection
->owner
;
5584 dwarf2_read_section (objfile
, section
);
5586 info_ptr
= section
->buffer
;
5588 while (info_ptr
< section
->buffer
+ section
->size
)
5590 unsigned int length
, initial_length_size
;
5591 struct dwarf2_per_cu_data
*this_cu
;
5594 offset
.sect_off
= info_ptr
- section
->buffer
;
5596 /* Read just enough information to find out where the next
5597 compilation unit is. */
5598 length
= read_initial_length (abfd
, info_ptr
, &initial_length_size
);
5600 /* Save the compilation unit for later lookup. */
5601 this_cu
= obstack_alloc (&objfile
->objfile_obstack
,
5602 sizeof (struct dwarf2_per_cu_data
));
5603 memset (this_cu
, 0, sizeof (*this_cu
));
5604 this_cu
->offset
= offset
;
5605 this_cu
->length
= length
+ initial_length_size
;
5606 this_cu
->is_dwz
= is_dwz
;
5607 this_cu
->objfile
= objfile
;
5608 this_cu
->info_or_types_section
= section
;
5610 if (*n_comp_units
== *n_allocated
)
5613 *all_comp_units
= xrealloc (*all_comp_units
,
5615 * sizeof (struct dwarf2_per_cu_data
*));
5617 (*all_comp_units
)[*n_comp_units
] = this_cu
;
5620 info_ptr
= info_ptr
+ this_cu
->length
;
5624 /* Create a list of all compilation units in OBJFILE.
5625 This is only done for -readnow and building partial symtabs. */
5628 create_all_comp_units (struct objfile
*objfile
)
5632 struct dwarf2_per_cu_data
**all_comp_units
;
5636 all_comp_units
= xmalloc (n_allocated
5637 * sizeof (struct dwarf2_per_cu_data
*));
5639 read_comp_units_from_section (objfile
, &dwarf2_per_objfile
->info
, 0,
5640 &n_allocated
, &n_comp_units
, &all_comp_units
);
5642 if (bfd_get_section_by_name (objfile
->obfd
, ".gnu_debugaltlink") != NULL
)
5644 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
5646 read_comp_units_from_section (objfile
, &dwz
->info
, 1,
5647 &n_allocated
, &n_comp_units
,
5651 dwarf2_per_objfile
->all_comp_units
5652 = obstack_alloc (&objfile
->objfile_obstack
,
5653 n_comp_units
* sizeof (struct dwarf2_per_cu_data
*));
5654 memcpy (dwarf2_per_objfile
->all_comp_units
, all_comp_units
,
5655 n_comp_units
* sizeof (struct dwarf2_per_cu_data
*));
5656 xfree (all_comp_units
);
5657 dwarf2_per_objfile
->n_comp_units
= n_comp_units
;
5660 /* Process all loaded DIEs for compilation unit CU, starting at
5661 FIRST_DIE. The caller should pass NEED_PC == 1 if the compilation
5662 unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or
5663 DW_AT_ranges). If NEED_PC is set, then this function will set
5664 *LOWPC and *HIGHPC to the lowest and highest PC values found in CU
5665 and record the covered ranges in the addrmap. */
5668 scan_partial_symbols (struct partial_die_info
*first_die
, CORE_ADDR
*lowpc
,
5669 CORE_ADDR
*highpc
, int need_pc
, struct dwarf2_cu
*cu
)
5671 struct partial_die_info
*pdi
;
5673 /* Now, march along the PDI's, descending into ones which have
5674 interesting children but skipping the children of the other ones,
5675 until we reach the end of the compilation unit. */
5681 fixup_partial_die (pdi
, cu
);
5683 /* Anonymous namespaces or modules have no name but have interesting
5684 children, so we need to look at them. Ditto for anonymous
5687 if (pdi
->name
!= NULL
|| pdi
->tag
== DW_TAG_namespace
5688 || pdi
->tag
== DW_TAG_module
|| pdi
->tag
== DW_TAG_enumeration_type
5689 || pdi
->tag
== DW_TAG_imported_unit
)
5693 case DW_TAG_subprogram
:
5694 add_partial_subprogram (pdi
, lowpc
, highpc
, need_pc
, cu
);
5696 case DW_TAG_constant
:
5697 case DW_TAG_variable
:
5698 case DW_TAG_typedef
:
5699 case DW_TAG_union_type
:
5700 if (!pdi
->is_declaration
)
5702 add_partial_symbol (pdi
, cu
);
5705 case DW_TAG_class_type
:
5706 case DW_TAG_interface_type
:
5707 case DW_TAG_structure_type
:
5708 if (!pdi
->is_declaration
)
5710 add_partial_symbol (pdi
, cu
);
5713 case DW_TAG_enumeration_type
:
5714 if (!pdi
->is_declaration
)
5715 add_partial_enumeration (pdi
, cu
);
5717 case DW_TAG_base_type
:
5718 case DW_TAG_subrange_type
:
5719 /* File scope base type definitions are added to the partial
5721 add_partial_symbol (pdi
, cu
);
5723 case DW_TAG_namespace
:
5724 add_partial_namespace (pdi
, lowpc
, highpc
, need_pc
, cu
);
5727 add_partial_module (pdi
, lowpc
, highpc
, need_pc
, cu
);
5729 case DW_TAG_imported_unit
:
5731 struct dwarf2_per_cu_data
*per_cu
;
5733 /* For now we don't handle imported units in type units. */
5734 if (cu
->per_cu
->is_debug_types
)
5736 error (_("Dwarf Error: DW_TAG_imported_unit is not"
5737 " supported in type units [in module %s]"),
5741 per_cu
= dwarf2_find_containing_comp_unit (pdi
->d
.offset
,
5745 /* Go read the partial unit, if needed. */
5746 if (per_cu
->v
.psymtab
== NULL
)
5747 process_psymtab_comp_unit (per_cu
, 1);
5749 VEC_safe_push (dwarf2_per_cu_ptr
,
5750 cu
->per_cu
->imported_symtabs
, per_cu
);
5758 /* If the die has a sibling, skip to the sibling. */
5760 pdi
= pdi
->die_sibling
;
5764 /* Functions used to compute the fully scoped name of a partial DIE.
5766 Normally, this is simple. For C++, the parent DIE's fully scoped
5767 name is concatenated with "::" and the partial DIE's name. For
5768 Java, the same thing occurs except that "." is used instead of "::".
5769 Enumerators are an exception; they use the scope of their parent
5770 enumeration type, i.e. the name of the enumeration type is not
5771 prepended to the enumerator.
5773 There are two complexities. One is DW_AT_specification; in this
5774 case "parent" means the parent of the target of the specification,
5775 instead of the direct parent of the DIE. The other is compilers
5776 which do not emit DW_TAG_namespace; in this case we try to guess
5777 the fully qualified name of structure types from their members'
5778 linkage names. This must be done using the DIE's children rather
5779 than the children of any DW_AT_specification target. We only need
5780 to do this for structures at the top level, i.e. if the target of
5781 any DW_AT_specification (if any; otherwise the DIE itself) does not
5784 /* Compute the scope prefix associated with PDI's parent, in
5785 compilation unit CU. The result will be allocated on CU's
5786 comp_unit_obstack, or a copy of the already allocated PDI->NAME
5787 field. NULL is returned if no prefix is necessary. */
5789 partial_die_parent_scope (struct partial_die_info
*pdi
,
5790 struct dwarf2_cu
*cu
)
5792 const char *grandparent_scope
;
5793 struct partial_die_info
*parent
, *real_pdi
;
5795 /* We need to look at our parent DIE; if we have a DW_AT_specification,
5796 then this means the parent of the specification DIE. */
5799 while (real_pdi
->has_specification
)
5800 real_pdi
= find_partial_die (real_pdi
->spec_offset
,
5801 real_pdi
->spec_is_dwz
, cu
);
5803 parent
= real_pdi
->die_parent
;
5807 if (parent
->scope_set
)
5808 return parent
->scope
;
5810 fixup_partial_die (parent
, cu
);
5812 grandparent_scope
= partial_die_parent_scope (parent
, cu
);
5814 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
5815 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
5816 Work around this problem here. */
5817 if (cu
->language
== language_cplus
5818 && parent
->tag
== DW_TAG_namespace
5819 && strcmp (parent
->name
, "::") == 0
5820 && grandparent_scope
== NULL
)
5822 parent
->scope
= NULL
;
5823 parent
->scope_set
= 1;
5827 if (pdi
->tag
== DW_TAG_enumerator
)
5828 /* Enumerators should not get the name of the enumeration as a prefix. */
5829 parent
->scope
= grandparent_scope
;
5830 else if (parent
->tag
== DW_TAG_namespace
5831 || parent
->tag
== DW_TAG_module
5832 || parent
->tag
== DW_TAG_structure_type
5833 || parent
->tag
== DW_TAG_class_type
5834 || parent
->tag
== DW_TAG_interface_type
5835 || parent
->tag
== DW_TAG_union_type
5836 || parent
->tag
== DW_TAG_enumeration_type
)
5838 if (grandparent_scope
== NULL
)
5839 parent
->scope
= parent
->name
;
5841 parent
->scope
= typename_concat (&cu
->comp_unit_obstack
,
5843 parent
->name
, 0, cu
);
5847 /* FIXME drow/2004-04-01: What should we be doing with
5848 function-local names? For partial symbols, we should probably be
5850 complaint (&symfile_complaints
,
5851 _("unhandled containing DIE tag %d for DIE at %d"),
5852 parent
->tag
, pdi
->offset
.sect_off
);
5853 parent
->scope
= grandparent_scope
;
5856 parent
->scope_set
= 1;
5857 return parent
->scope
;
5860 /* Return the fully scoped name associated with PDI, from compilation unit
5861 CU. The result will be allocated with malloc. */
5864 partial_die_full_name (struct partial_die_info
*pdi
,
5865 struct dwarf2_cu
*cu
)
5867 const char *parent_scope
;
5869 /* If this is a template instantiation, we can not work out the
5870 template arguments from partial DIEs. So, unfortunately, we have
5871 to go through the full DIEs. At least any work we do building
5872 types here will be reused if full symbols are loaded later. */
5873 if (pdi
->has_template_arguments
)
5875 fixup_partial_die (pdi
, cu
);
5877 if (pdi
->name
!= NULL
&& strchr (pdi
->name
, '<') == NULL
)
5879 struct die_info
*die
;
5880 struct attribute attr
;
5881 struct dwarf2_cu
*ref_cu
= cu
;
5883 /* DW_FORM_ref_addr is using section offset. */
5885 attr
.form
= DW_FORM_ref_addr
;
5886 attr
.u
.unsnd
= pdi
->offset
.sect_off
;
5887 die
= follow_die_ref (NULL
, &attr
, &ref_cu
);
5889 return xstrdup (dwarf2_full_name (NULL
, die
, ref_cu
));
5893 parent_scope
= partial_die_parent_scope (pdi
, cu
);
5894 if (parent_scope
== NULL
)
5897 return typename_concat (NULL
, parent_scope
, pdi
->name
, 0, cu
);
5901 add_partial_symbol (struct partial_die_info
*pdi
, struct dwarf2_cu
*cu
)
5903 struct objfile
*objfile
= cu
->objfile
;
5905 const char *actual_name
= NULL
;
5907 char *built_actual_name
;
5909 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
5911 built_actual_name
= partial_die_full_name (pdi
, cu
);
5912 if (built_actual_name
!= NULL
)
5913 actual_name
= built_actual_name
;
5915 if (actual_name
== NULL
)
5916 actual_name
= pdi
->name
;
5920 case DW_TAG_subprogram
:
5921 if (pdi
->is_external
|| cu
->language
== language_ada
)
5923 /* brobecker/2007-12-26: Normally, only "external" DIEs are part
5924 of the global scope. But in Ada, we want to be able to access
5925 nested procedures globally. So all Ada subprograms are stored
5926 in the global scope. */
5927 /* prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
5928 mst_text, objfile); */
5929 add_psymbol_to_list (actual_name
, strlen (actual_name
),
5930 built_actual_name
!= NULL
,
5931 VAR_DOMAIN
, LOC_BLOCK
,
5932 &objfile
->global_psymbols
,
5933 0, pdi
->lowpc
+ baseaddr
,
5934 cu
->language
, objfile
);
5938 /* prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
5939 mst_file_text, objfile); */
5940 add_psymbol_to_list (actual_name
, strlen (actual_name
),
5941 built_actual_name
!= NULL
,
5942 VAR_DOMAIN
, LOC_BLOCK
,
5943 &objfile
->static_psymbols
,
5944 0, pdi
->lowpc
+ baseaddr
,
5945 cu
->language
, objfile
);
5948 case DW_TAG_constant
:
5950 struct psymbol_allocation_list
*list
;
5952 if (pdi
->is_external
)
5953 list
= &objfile
->global_psymbols
;
5955 list
= &objfile
->static_psymbols
;
5956 add_psymbol_to_list (actual_name
, strlen (actual_name
),
5957 built_actual_name
!= NULL
, VAR_DOMAIN
, LOC_STATIC
,
5958 list
, 0, 0, cu
->language
, objfile
);
5961 case DW_TAG_variable
:
5963 addr
= decode_locdesc (pdi
->d
.locdesc
, cu
);
5967 && !dwarf2_per_objfile
->has_section_at_zero
)
5969 /* A global or static variable may also have been stripped
5970 out by the linker if unused, in which case its address
5971 will be nullified; do not add such variables into partial
5972 symbol table then. */
5974 else if (pdi
->is_external
)
5977 Don't enter into the minimal symbol tables as there is
5978 a minimal symbol table entry from the ELF symbols already.
5979 Enter into partial symbol table if it has a location
5980 descriptor or a type.
5981 If the location descriptor is missing, new_symbol will create
5982 a LOC_UNRESOLVED symbol, the address of the variable will then
5983 be determined from the minimal symbol table whenever the variable
5985 The address for the partial symbol table entry is not
5986 used by GDB, but it comes in handy for debugging partial symbol
5989 if (pdi
->d
.locdesc
|| pdi
->has_type
)
5990 add_psymbol_to_list (actual_name
, strlen (actual_name
),
5991 built_actual_name
!= NULL
,
5992 VAR_DOMAIN
, LOC_STATIC
,
5993 &objfile
->global_psymbols
,
5995 cu
->language
, objfile
);
5999 /* Static Variable. Skip symbols without location descriptors. */
6000 if (pdi
->d
.locdesc
== NULL
)
6002 xfree (built_actual_name
);
6005 /* prim_record_minimal_symbol (actual_name, addr + baseaddr,
6006 mst_file_data, objfile); */
6007 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6008 built_actual_name
!= NULL
,
6009 VAR_DOMAIN
, LOC_STATIC
,
6010 &objfile
->static_psymbols
,
6012 cu
->language
, objfile
);
6015 case DW_TAG_typedef
:
6016 case DW_TAG_base_type
:
6017 case DW_TAG_subrange_type
:
6018 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6019 built_actual_name
!= NULL
,
6020 VAR_DOMAIN
, LOC_TYPEDEF
,
6021 &objfile
->static_psymbols
,
6022 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
6024 case DW_TAG_namespace
:
6025 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6026 built_actual_name
!= NULL
,
6027 VAR_DOMAIN
, LOC_TYPEDEF
,
6028 &objfile
->global_psymbols
,
6029 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
6031 case DW_TAG_class_type
:
6032 case DW_TAG_interface_type
:
6033 case DW_TAG_structure_type
:
6034 case DW_TAG_union_type
:
6035 case DW_TAG_enumeration_type
:
6036 /* Skip external references. The DWARF standard says in the section
6037 about "Structure, Union, and Class Type Entries": "An incomplete
6038 structure, union or class type is represented by a structure,
6039 union or class entry that does not have a byte size attribute
6040 and that has a DW_AT_declaration attribute." */
6041 if (!pdi
->has_byte_size
&& pdi
->is_declaration
)
6043 xfree (built_actual_name
);
6047 /* NOTE: carlton/2003-10-07: See comment in new_symbol about
6048 static vs. global. */
6049 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6050 built_actual_name
!= NULL
,
6051 STRUCT_DOMAIN
, LOC_TYPEDEF
,
6052 (cu
->language
== language_cplus
6053 || cu
->language
== language_java
)
6054 ? &objfile
->global_psymbols
6055 : &objfile
->static_psymbols
,
6056 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
6059 case DW_TAG_enumerator
:
6060 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6061 built_actual_name
!= NULL
,
6062 VAR_DOMAIN
, LOC_CONST
,
6063 (cu
->language
== language_cplus
6064 || cu
->language
== language_java
)
6065 ? &objfile
->global_psymbols
6066 : &objfile
->static_psymbols
,
6067 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
6073 xfree (built_actual_name
);
6076 /* Read a partial die corresponding to a namespace; also, add a symbol
6077 corresponding to that namespace to the symbol table. NAMESPACE is
6078 the name of the enclosing namespace. */
6081 add_partial_namespace (struct partial_die_info
*pdi
,
6082 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
6083 int need_pc
, struct dwarf2_cu
*cu
)
6085 /* Add a symbol for the namespace. */
6087 add_partial_symbol (pdi
, cu
);
6089 /* Now scan partial symbols in that namespace. */
6091 if (pdi
->has_children
)
6092 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, need_pc
, cu
);
6095 /* Read a partial die corresponding to a Fortran module. */
6098 add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
6099 CORE_ADDR
*highpc
, int need_pc
, struct dwarf2_cu
*cu
)
6101 /* Now scan partial symbols in that module. */
6103 if (pdi
->has_children
)
6104 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, need_pc
, cu
);
6107 /* Read a partial die corresponding to a subprogram and create a partial
6108 symbol for that subprogram. When the CU language allows it, this
6109 routine also defines a partial symbol for each nested subprogram
6110 that this subprogram contains.
6112 DIE my also be a lexical block, in which case we simply search
6113 recursively for suprograms defined inside that lexical block.
6114 Again, this is only performed when the CU language allows this
6115 type of definitions. */
6118 add_partial_subprogram (struct partial_die_info
*pdi
,
6119 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
6120 int need_pc
, struct dwarf2_cu
*cu
)
6122 if (pdi
->tag
== DW_TAG_subprogram
)
6124 if (pdi
->has_pc_info
)
6126 if (pdi
->lowpc
< *lowpc
)
6127 *lowpc
= pdi
->lowpc
;
6128 if (pdi
->highpc
> *highpc
)
6129 *highpc
= pdi
->highpc
;
6133 struct objfile
*objfile
= cu
->objfile
;
6135 baseaddr
= ANOFFSET (objfile
->section_offsets
,
6136 SECT_OFF_TEXT (objfile
));
6137 addrmap_set_empty (objfile
->psymtabs_addrmap
,
6138 pdi
->lowpc
+ baseaddr
,
6139 pdi
->highpc
- 1 + baseaddr
,
6140 cu
->per_cu
->v
.psymtab
);
6144 if (pdi
->has_pc_info
|| (!pdi
->is_external
&& pdi
->may_be_inlined
))
6146 if (!pdi
->is_declaration
)
6147 /* Ignore subprogram DIEs that do not have a name, they are
6148 illegal. Do not emit a complaint at this point, we will
6149 do so when we convert this psymtab into a symtab. */
6151 add_partial_symbol (pdi
, cu
);
6155 if (! pdi
->has_children
)
6158 if (cu
->language
== language_ada
)
6160 pdi
= pdi
->die_child
;
6163 fixup_partial_die (pdi
, cu
);
6164 if (pdi
->tag
== DW_TAG_subprogram
6165 || pdi
->tag
== DW_TAG_lexical_block
)
6166 add_partial_subprogram (pdi
, lowpc
, highpc
, need_pc
, cu
);
6167 pdi
= pdi
->die_sibling
;
6172 /* Read a partial die corresponding to an enumeration type. */
6175 add_partial_enumeration (struct partial_die_info
*enum_pdi
,
6176 struct dwarf2_cu
*cu
)
6178 struct partial_die_info
*pdi
;
6180 if (enum_pdi
->name
!= NULL
)
6181 add_partial_symbol (enum_pdi
, cu
);
6183 pdi
= enum_pdi
->die_child
;
6186 if (pdi
->tag
!= DW_TAG_enumerator
|| pdi
->name
== NULL
)
6187 complaint (&symfile_complaints
, _("malformed enumerator DIE ignored"));
6189 add_partial_symbol (pdi
, cu
);
6190 pdi
= pdi
->die_sibling
;
6194 /* Return the initial uleb128 in the die at INFO_PTR. */
6197 peek_abbrev_code (bfd
*abfd
, gdb_byte
*info_ptr
)
6199 unsigned int bytes_read
;
6201 return read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
6204 /* Read the initial uleb128 in the die at INFO_PTR in compilation unit CU.
6205 Return the corresponding abbrev, or NULL if the number is zero (indicating
6206 an empty DIE). In either case *BYTES_READ will be set to the length of
6207 the initial number. */
6209 static struct abbrev_info
*
6210 peek_die_abbrev (gdb_byte
*info_ptr
, unsigned int *bytes_read
,
6211 struct dwarf2_cu
*cu
)
6213 bfd
*abfd
= cu
->objfile
->obfd
;
6214 unsigned int abbrev_number
;
6215 struct abbrev_info
*abbrev
;
6217 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
6219 if (abbrev_number
== 0)
6222 abbrev
= abbrev_table_lookup_abbrev (cu
->abbrev_table
, abbrev_number
);
6225 error (_("Dwarf Error: Could not find abbrev number %d [in module %s]"),
6226 abbrev_number
, bfd_get_filename (abfd
));
6232 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
6233 Returns a pointer to the end of a series of DIEs, terminated by an empty
6234 DIE. Any children of the skipped DIEs will also be skipped. */
6237 skip_children (const struct die_reader_specs
*reader
, gdb_byte
*info_ptr
)
6239 struct dwarf2_cu
*cu
= reader
->cu
;
6240 struct abbrev_info
*abbrev
;
6241 unsigned int bytes_read
;
6245 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
6247 return info_ptr
+ bytes_read
;
6249 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
6253 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
6254 INFO_PTR should point just after the initial uleb128 of a DIE, and the
6255 abbrev corresponding to that skipped uleb128 should be passed in
6256 ABBREV. Returns a pointer to this DIE's sibling, skipping any
6260 skip_one_die (const struct die_reader_specs
*reader
, gdb_byte
*info_ptr
,
6261 struct abbrev_info
*abbrev
)
6263 unsigned int bytes_read
;
6264 struct attribute attr
;
6265 bfd
*abfd
= reader
->abfd
;
6266 struct dwarf2_cu
*cu
= reader
->cu
;
6267 gdb_byte
*buffer
= reader
->buffer
;
6268 const gdb_byte
*buffer_end
= reader
->buffer_end
;
6269 gdb_byte
*start_info_ptr
= info_ptr
;
6270 unsigned int form
, i
;
6272 for (i
= 0; i
< abbrev
->num_attrs
; i
++)
6274 /* The only abbrev we care about is DW_AT_sibling. */
6275 if (abbrev
->attrs
[i
].name
== DW_AT_sibling
)
6277 read_attribute (reader
, &attr
, &abbrev
->attrs
[i
], info_ptr
);
6278 if (attr
.form
== DW_FORM_ref_addr
)
6279 complaint (&symfile_complaints
,
6280 _("ignoring absolute DW_AT_sibling"));
6282 return buffer
+ dwarf2_get_ref_die_offset (&attr
).sect_off
;
6285 /* If it isn't DW_AT_sibling, skip this attribute. */
6286 form
= abbrev
->attrs
[i
].form
;
6290 case DW_FORM_ref_addr
:
6291 /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3
6292 and later it is offset sized. */
6293 if (cu
->header
.version
== 2)
6294 info_ptr
+= cu
->header
.addr_size
;
6296 info_ptr
+= cu
->header
.offset_size
;
6298 case DW_FORM_GNU_ref_alt
:
6299 info_ptr
+= cu
->header
.offset_size
;
6302 info_ptr
+= cu
->header
.addr_size
;
6309 case DW_FORM_flag_present
:
6321 case DW_FORM_ref_sig8
:
6324 case DW_FORM_string
:
6325 read_direct_string (abfd
, info_ptr
, &bytes_read
);
6326 info_ptr
+= bytes_read
;
6328 case DW_FORM_sec_offset
:
6330 case DW_FORM_GNU_strp_alt
:
6331 info_ptr
+= cu
->header
.offset_size
;
6333 case DW_FORM_exprloc
:
6335 info_ptr
+= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
6336 info_ptr
+= bytes_read
;
6338 case DW_FORM_block1
:
6339 info_ptr
+= 1 + read_1_byte (abfd
, info_ptr
);
6341 case DW_FORM_block2
:
6342 info_ptr
+= 2 + read_2_bytes (abfd
, info_ptr
);
6344 case DW_FORM_block4
:
6345 info_ptr
+= 4 + read_4_bytes (abfd
, info_ptr
);
6349 case DW_FORM_ref_udata
:
6350 case DW_FORM_GNU_addr_index
:
6351 case DW_FORM_GNU_str_index
:
6352 info_ptr
= (gdb_byte
*) safe_skip_leb128 (info_ptr
, buffer_end
);
6354 case DW_FORM_indirect
:
6355 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
6356 info_ptr
+= bytes_read
;
6357 /* We need to continue parsing from here, so just go back to
6359 goto skip_attribute
;
6362 error (_("Dwarf Error: Cannot handle %s "
6363 "in DWARF reader [in module %s]"),
6364 dwarf_form_name (form
),
6365 bfd_get_filename (abfd
));
6369 if (abbrev
->has_children
)
6370 return skip_children (reader
, info_ptr
);
6375 /* Locate ORIG_PDI's sibling.
6376 INFO_PTR should point to the start of the next DIE after ORIG_PDI. */
6379 locate_pdi_sibling (const struct die_reader_specs
*reader
,
6380 struct partial_die_info
*orig_pdi
,
6383 /* Do we know the sibling already? */
6385 if (orig_pdi
->sibling
)
6386 return orig_pdi
->sibling
;
6388 /* Are there any children to deal with? */
6390 if (!orig_pdi
->has_children
)
6393 /* Skip the children the long way. */
6395 return skip_children (reader
, info_ptr
);
6398 /* Expand this partial symbol table into a full symbol table. SELF is
6402 dwarf2_read_symtab (struct partial_symtab
*self
,
6403 struct objfile
*objfile
)
6407 warning (_("bug: psymtab for %s is already read in."),
6414 printf_filtered (_("Reading in symbols for %s..."),
6416 gdb_flush (gdb_stdout
);
6419 /* Restore our global data. */
6420 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
6422 /* If this psymtab is constructed from a debug-only objfile, the
6423 has_section_at_zero flag will not necessarily be correct. We
6424 can get the correct value for this flag by looking at the data
6425 associated with the (presumably stripped) associated objfile. */
6426 if (objfile
->separate_debug_objfile_backlink
)
6428 struct dwarf2_per_objfile
*dpo_backlink
6429 = objfile_data (objfile
->separate_debug_objfile_backlink
,
6430 dwarf2_objfile_data_key
);
6432 dwarf2_per_objfile
->has_section_at_zero
6433 = dpo_backlink
->has_section_at_zero
;
6436 dwarf2_per_objfile
->reading_partial_symbols
= 0;
6438 psymtab_to_symtab_1 (self
);
6440 /* Finish up the debug error message. */
6442 printf_filtered (_("done.\n"));
6445 process_cu_includes ();
6448 /* Reading in full CUs. */
6450 /* Add PER_CU to the queue. */
6453 queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
6454 enum language pretend_language
)
6456 struct dwarf2_queue_item
*item
;
6459 item
= xmalloc (sizeof (*item
));
6460 item
->per_cu
= per_cu
;
6461 item
->pretend_language
= pretend_language
;
6464 if (dwarf2_queue
== NULL
)
6465 dwarf2_queue
= item
;
6467 dwarf2_queue_tail
->next
= item
;
6469 dwarf2_queue_tail
= item
;
6472 /* THIS_CU has a reference to PER_CU. If necessary, load the new compilation
6473 unit and add it to our queue.
6474 The result is non-zero if PER_CU was queued, otherwise the result is zero
6475 meaning either PER_CU is already queued or it is already loaded. */
6478 maybe_queue_comp_unit (struct dwarf2_cu
*this_cu
,
6479 struct dwarf2_per_cu_data
*per_cu
,
6480 enum language pretend_language
)
6482 /* We may arrive here during partial symbol reading, if we need full
6483 DIEs to process an unusual case (e.g. template arguments). Do
6484 not queue PER_CU, just tell our caller to load its DIEs. */
6485 if (dwarf2_per_objfile
->reading_partial_symbols
)
6487 if (per_cu
->cu
== NULL
|| per_cu
->cu
->dies
== NULL
)
6492 /* Mark the dependence relation so that we don't flush PER_CU
6494 dwarf2_add_dependence (this_cu
, per_cu
);
6496 /* If it's already on the queue, we have nothing to do. */
6500 /* If the compilation unit is already loaded, just mark it as
6502 if (per_cu
->cu
!= NULL
)
6504 per_cu
->cu
->last_used
= 0;
6508 /* Add it to the queue. */
6509 queue_comp_unit (per_cu
, pretend_language
);
6514 /* Process the queue. */
6517 process_queue (void)
6519 struct dwarf2_queue_item
*item
, *next_item
;
6521 if (dwarf2_read_debug
)
6523 fprintf_unfiltered (gdb_stdlog
,
6524 "Expanding one or more symtabs of objfile %s ...\n",
6525 dwarf2_per_objfile
->objfile
->name
);
6528 /* The queue starts out with one item, but following a DIE reference
6529 may load a new CU, adding it to the end of the queue. */
6530 for (item
= dwarf2_queue
; item
!= NULL
; dwarf2_queue
= item
= next_item
)
6532 if (dwarf2_per_objfile
->using_index
6533 ? !item
->per_cu
->v
.quick
->symtab
6534 : (item
->per_cu
->v
.psymtab
&& !item
->per_cu
->v
.psymtab
->readin
))
6536 struct dwarf2_per_cu_data
*per_cu
= item
->per_cu
;
6538 if (dwarf2_read_debug
)
6540 fprintf_unfiltered (gdb_stdlog
,
6541 "Expanding symtab of %s at offset 0x%x\n",
6542 per_cu
->is_debug_types
? "TU" : "CU",
6543 per_cu
->offset
.sect_off
);
6546 if (per_cu
->is_debug_types
)
6547 process_full_type_unit (per_cu
, item
->pretend_language
);
6549 process_full_comp_unit (per_cu
, item
->pretend_language
);
6551 if (dwarf2_read_debug
)
6553 fprintf_unfiltered (gdb_stdlog
,
6554 "Done expanding %s at offset 0x%x\n",
6555 per_cu
->is_debug_types
? "TU" : "CU",
6556 per_cu
->offset
.sect_off
);
6560 item
->per_cu
->queued
= 0;
6561 next_item
= item
->next
;
6565 dwarf2_queue_tail
= NULL
;
6567 if (dwarf2_read_debug
)
6569 fprintf_unfiltered (gdb_stdlog
, "Done expanding symtabs of %s.\n",
6570 dwarf2_per_objfile
->objfile
->name
);
6574 /* Free all allocated queue entries. This function only releases anything if
6575 an error was thrown; if the queue was processed then it would have been
6576 freed as we went along. */
6579 dwarf2_release_queue (void *dummy
)
6581 struct dwarf2_queue_item
*item
, *last
;
6583 item
= dwarf2_queue
;
6586 /* Anything still marked queued is likely to be in an
6587 inconsistent state, so discard it. */
6588 if (item
->per_cu
->queued
)
6590 if (item
->per_cu
->cu
!= NULL
)
6591 free_one_cached_comp_unit (item
->per_cu
);
6592 item
->per_cu
->queued
= 0;
6600 dwarf2_queue
= dwarf2_queue_tail
= NULL
;
6603 /* Read in full symbols for PST, and anything it depends on. */
6606 psymtab_to_symtab_1 (struct partial_symtab
*pst
)
6608 struct dwarf2_per_cu_data
*per_cu
;
6614 for (i
= 0; i
< pst
->number_of_dependencies
; i
++)
6615 if (!pst
->dependencies
[i
]->readin
6616 && pst
->dependencies
[i
]->user
== NULL
)
6618 /* Inform about additional files that need to be read in. */
6621 /* FIXME: i18n: Need to make this a single string. */
6622 fputs_filtered (" ", gdb_stdout
);
6624 fputs_filtered ("and ", gdb_stdout
);
6626 printf_filtered ("%s...", pst
->dependencies
[i
]->filename
);
6627 wrap_here (""); /* Flush output. */
6628 gdb_flush (gdb_stdout
);
6630 psymtab_to_symtab_1 (pst
->dependencies
[i
]);
6633 per_cu
= pst
->read_symtab_private
;
6637 /* It's an include file, no symbols to read for it.
6638 Everything is in the parent symtab. */
6643 dw2_do_instantiate_symtab (per_cu
);
6646 /* Trivial hash function for die_info: the hash value of a DIE
6647 is its offset in .debug_info for this objfile. */
6650 die_hash (const void *item
)
6652 const struct die_info
*die
= item
;
6654 return die
->offset
.sect_off
;
6657 /* Trivial comparison function for die_info structures: two DIEs
6658 are equal if they have the same offset. */
6661 die_eq (const void *item_lhs
, const void *item_rhs
)
6663 const struct die_info
*die_lhs
= item_lhs
;
6664 const struct die_info
*die_rhs
= item_rhs
;
6666 return die_lhs
->offset
.sect_off
== die_rhs
->offset
.sect_off
;
6669 /* die_reader_func for load_full_comp_unit.
6670 This is identical to read_signatured_type_reader,
6671 but is kept separate for now. */
6674 load_full_comp_unit_reader (const struct die_reader_specs
*reader
,
6676 struct die_info
*comp_unit_die
,
6680 struct dwarf2_cu
*cu
= reader
->cu
;
6681 enum language
*language_ptr
= data
;
6683 gdb_assert (cu
->die_hash
== NULL
);
6685 htab_create_alloc_ex (cu
->header
.length
/ 12,
6689 &cu
->comp_unit_obstack
,
6690 hashtab_obstack_allocate
,
6691 dummy_obstack_deallocate
);
6694 comp_unit_die
->child
= read_die_and_siblings (reader
, info_ptr
,
6695 &info_ptr
, comp_unit_die
);
6696 cu
->dies
= comp_unit_die
;
6697 /* comp_unit_die is not stored in die_hash, no need. */
6699 /* We try not to read any attributes in this function, because not
6700 all CUs needed for references have been loaded yet, and symbol
6701 table processing isn't initialized. But we have to set the CU language,
6702 or we won't be able to build types correctly.
6703 Similarly, if we do not read the producer, we can not apply
6704 producer-specific interpretation. */
6705 prepare_one_comp_unit (cu
, cu
->dies
, *language_ptr
);
6708 /* Load the DIEs associated with PER_CU into memory. */
6711 load_full_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
6712 enum language pretend_language
)
6714 gdb_assert (! this_cu
->is_debug_types
);
6716 init_cutu_and_read_dies (this_cu
, NULL
, 1, 1,
6717 load_full_comp_unit_reader
, &pretend_language
);
6720 /* Add a DIE to the delayed physname list. */
6723 add_to_method_list (struct type
*type
, int fnfield_index
, int index
,
6724 const char *name
, struct die_info
*die
,
6725 struct dwarf2_cu
*cu
)
6727 struct delayed_method_info mi
;
6729 mi
.fnfield_index
= fnfield_index
;
6733 VEC_safe_push (delayed_method_info
, cu
->method_list
, &mi
);
6736 /* A cleanup for freeing the delayed method list. */
6739 free_delayed_list (void *ptr
)
6741 struct dwarf2_cu
*cu
= (struct dwarf2_cu
*) ptr
;
6742 if (cu
->method_list
!= NULL
)
6744 VEC_free (delayed_method_info
, cu
->method_list
);
6745 cu
->method_list
= NULL
;
6749 /* Compute the physnames of any methods on the CU's method list.
6751 The computation of method physnames is delayed in order to avoid the
6752 (bad) condition that one of the method's formal parameters is of an as yet
6756 compute_delayed_physnames (struct dwarf2_cu
*cu
)
6759 struct delayed_method_info
*mi
;
6760 for (i
= 0; VEC_iterate (delayed_method_info
, cu
->method_list
, i
, mi
) ; ++i
)
6762 const char *physname
;
6763 struct fn_fieldlist
*fn_flp
6764 = &TYPE_FN_FIELDLIST (mi
->type
, mi
->fnfield_index
);
6765 physname
= dwarf2_physname (mi
->name
, mi
->die
, cu
);
6766 fn_flp
->fn_fields
[mi
->index
].physname
= physname
? physname
: "";
6770 /* Go objects should be embedded in a DW_TAG_module DIE,
6771 and it's not clear if/how imported objects will appear.
6772 To keep Go support simple until that's worked out,
6773 go back through what we've read and create something usable.
6774 We could do this while processing each DIE, and feels kinda cleaner,
6775 but that way is more invasive.
6776 This is to, for example, allow the user to type "p var" or "b main"
6777 without having to specify the package name, and allow lookups
6778 of module.object to work in contexts that use the expression
6782 fixup_go_packaging (struct dwarf2_cu
*cu
)
6784 char *package_name
= NULL
;
6785 struct pending
*list
;
6788 for (list
= global_symbols
; list
!= NULL
; list
= list
->next
)
6790 for (i
= 0; i
< list
->nsyms
; ++i
)
6792 struct symbol
*sym
= list
->symbol
[i
];
6794 if (SYMBOL_LANGUAGE (sym
) == language_go
6795 && SYMBOL_CLASS (sym
) == LOC_BLOCK
)
6797 char *this_package_name
= go_symbol_package_name (sym
);
6799 if (this_package_name
== NULL
)
6801 if (package_name
== NULL
)
6802 package_name
= this_package_name
;
6805 if (strcmp (package_name
, this_package_name
) != 0)
6806 complaint (&symfile_complaints
,
6807 _("Symtab %s has objects from two different Go packages: %s and %s"),
6808 (SYMBOL_SYMTAB (sym
)
6809 ? SYMBOL_SYMTAB (sym
)->filename
6810 : cu
->objfile
->name
),
6811 this_package_name
, package_name
);
6812 xfree (this_package_name
);
6818 if (package_name
!= NULL
)
6820 struct objfile
*objfile
= cu
->objfile
;
6821 const char *saved_package_name
= obstack_copy0 (&objfile
->objfile_obstack
,
6823 strlen (package_name
));
6824 struct type
*type
= init_type (TYPE_CODE_MODULE
, 0, 0,
6825 saved_package_name
, objfile
);
6828 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
6830 sym
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct symbol
);
6831 SYMBOL_SET_LANGUAGE (sym
, language_go
);
6832 SYMBOL_SET_NAMES (sym
, saved_package_name
,
6833 strlen (saved_package_name
), 0, objfile
);
6834 /* This is not VAR_DOMAIN because we want a way to ensure a lookup of,
6835 e.g., "main" finds the "main" module and not C's main(). */
6836 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
6837 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
6838 SYMBOL_TYPE (sym
) = type
;
6840 add_symbol_to_list (sym
, &global_symbols
);
6842 xfree (package_name
);
6846 static void compute_symtab_includes (struct dwarf2_per_cu_data
*per_cu
);
6848 /* Return the symtab for PER_CU. This works properly regardless of
6849 whether we're using the index or psymtabs. */
6851 static struct symtab
*
6852 get_symtab (struct dwarf2_per_cu_data
*per_cu
)
6854 return (dwarf2_per_objfile
->using_index
6855 ? per_cu
->v
.quick
->symtab
6856 : per_cu
->v
.psymtab
->symtab
);
6859 /* A helper function for computing the list of all symbol tables
6860 included by PER_CU. */
6863 recursively_compute_inclusions (VEC (dwarf2_per_cu_ptr
) **result
,
6864 htab_t all_children
,
6865 struct dwarf2_per_cu_data
*per_cu
)
6869 struct dwarf2_per_cu_data
*iter
;
6871 slot
= htab_find_slot (all_children
, per_cu
, INSERT
);
6874 /* This inclusion and its children have been processed. */
6879 /* Only add a CU if it has a symbol table. */
6880 if (get_symtab (per_cu
) != NULL
)
6881 VEC_safe_push (dwarf2_per_cu_ptr
, *result
, per_cu
);
6884 VEC_iterate (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
, ix
, iter
);
6886 recursively_compute_inclusions (result
, all_children
, iter
);
6889 /* Compute the symtab 'includes' fields for the symtab related to
6893 compute_symtab_includes (struct dwarf2_per_cu_data
*per_cu
)
6895 gdb_assert (! per_cu
->is_debug_types
);
6897 if (!VEC_empty (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
))
6900 struct dwarf2_per_cu_data
*iter
;
6901 VEC (dwarf2_per_cu_ptr
) *result_children
= NULL
;
6902 htab_t all_children
;
6903 struct symtab
*symtab
= get_symtab (per_cu
);
6905 /* If we don't have a symtab, we can just skip this case. */
6909 all_children
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
6910 NULL
, xcalloc
, xfree
);
6913 VEC_iterate (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
,
6916 recursively_compute_inclusions (&result_children
, all_children
, iter
);
6918 /* Now we have a transitive closure of all the included CUs, and
6919 for .gdb_index version 7 the included TUs, so we can convert it
6920 to a list of symtabs. */
6921 len
= VEC_length (dwarf2_per_cu_ptr
, result_children
);
6923 = obstack_alloc (&dwarf2_per_objfile
->objfile
->objfile_obstack
,
6924 (len
+ 1) * sizeof (struct symtab
*));
6926 VEC_iterate (dwarf2_per_cu_ptr
, result_children
, ix
, iter
);
6928 symtab
->includes
[ix
] = get_symtab (iter
);
6929 symtab
->includes
[len
] = NULL
;
6931 VEC_free (dwarf2_per_cu_ptr
, result_children
);
6932 htab_delete (all_children
);
6936 /* Compute the 'includes' field for the symtabs of all the CUs we just
6940 process_cu_includes (void)
6943 struct dwarf2_per_cu_data
*iter
;
6946 VEC_iterate (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
,
6950 if (! iter
->is_debug_types
)
6951 compute_symtab_includes (iter
);
6954 VEC_free (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
);
6957 /* Generate full symbol information for PER_CU, whose DIEs have
6958 already been loaded into memory. */
6961 process_full_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
6962 enum language pretend_language
)
6964 struct dwarf2_cu
*cu
= per_cu
->cu
;
6965 struct objfile
*objfile
= per_cu
->objfile
;
6966 CORE_ADDR lowpc
, highpc
;
6967 struct symtab
*symtab
;
6968 struct cleanup
*back_to
, *delayed_list_cleanup
;
6970 struct block
*static_block
;
6972 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
6975 back_to
= make_cleanup (really_free_pendings
, NULL
);
6976 delayed_list_cleanup
= make_cleanup (free_delayed_list
, cu
);
6978 cu
->list_in_scope
= &file_symbols
;
6980 cu
->language
= pretend_language
;
6981 cu
->language_defn
= language_def (cu
->language
);
6983 /* Do line number decoding in read_file_scope () */
6984 process_die (cu
->dies
, cu
);
6986 /* For now fudge the Go package. */
6987 if (cu
->language
== language_go
)
6988 fixup_go_packaging (cu
);
6990 /* Now that we have processed all the DIEs in the CU, all the types
6991 should be complete, and it should now be safe to compute all of the
6993 compute_delayed_physnames (cu
);
6994 do_cleanups (delayed_list_cleanup
);
6996 /* Some compilers don't define a DW_AT_high_pc attribute for the
6997 compilation unit. If the DW_AT_high_pc is missing, synthesize
6998 it, by scanning the DIE's below the compilation unit. */
6999 get_scope_pc_bounds (cu
->dies
, &lowpc
, &highpc
, cu
);
7002 = end_symtab_get_static_block (highpc
+ baseaddr
, objfile
, 0,
7003 per_cu
->imported_symtabs
!= NULL
);
7005 /* If the comp unit has DW_AT_ranges, it may have discontiguous ranges.
7006 Also, DW_AT_ranges may record ranges not belonging to any child DIEs
7007 (such as virtual method tables). Record the ranges in STATIC_BLOCK's
7008 addrmap to help ensure it has an accurate map of pc values belonging to
7010 dwarf2_record_block_ranges (cu
->dies
, static_block
, baseaddr
, cu
);
7012 symtab
= end_symtab_from_static_block (static_block
, objfile
,
7013 SECT_OFF_TEXT (objfile
), 0);
7017 int gcc_4_minor
= producer_is_gcc_ge_4 (cu
->producer
);
7019 /* Set symtab language to language from DW_AT_language. If the
7020 compilation is from a C file generated by language preprocessors, do
7021 not set the language if it was already deduced by start_subfile. */
7022 if (!(cu
->language
== language_c
&& symtab
->language
!= language_c
))
7023 symtab
->language
= cu
->language
;
7025 /* GCC-4.0 has started to support -fvar-tracking. GCC-3.x still can
7026 produce DW_AT_location with location lists but it can be possibly
7027 invalid without -fvar-tracking. Still up to GCC-4.4.x incl. 4.4.0
7028 there were bugs in prologue debug info, fixed later in GCC-4.5
7029 by "unwind info for epilogues" patch (which is not directly related).
7031 For -gdwarf-4 type units LOCATIONS_VALID indication is fortunately not
7032 needed, it would be wrong due to missing DW_AT_producer there.
7034 Still one can confuse GDB by using non-standard GCC compilation
7035 options - this waits on GCC PR other/32998 (-frecord-gcc-switches).
7037 if (cu
->has_loclist
&& gcc_4_minor
>= 5)
7038 symtab
->locations_valid
= 1;
7040 if (gcc_4_minor
>= 5)
7041 symtab
->epilogue_unwind_valid
= 1;
7043 symtab
->call_site_htab
= cu
->call_site_htab
;
7046 if (dwarf2_per_objfile
->using_index
)
7047 per_cu
->v
.quick
->symtab
= symtab
;
7050 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
7051 pst
->symtab
= symtab
;
7055 /* Push it for inclusion processing later. */
7056 VEC_safe_push (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
, per_cu
);
7058 do_cleanups (back_to
);
7061 /* Generate full symbol information for type unit PER_CU, whose DIEs have
7062 already been loaded into memory. */
7065 process_full_type_unit (struct dwarf2_per_cu_data
*per_cu
,
7066 enum language pretend_language
)
7068 struct dwarf2_cu
*cu
= per_cu
->cu
;
7069 struct objfile
*objfile
= per_cu
->objfile
;
7070 struct symtab
*symtab
;
7071 struct cleanup
*back_to
, *delayed_list_cleanup
;
7074 back_to
= make_cleanup (really_free_pendings
, NULL
);
7075 delayed_list_cleanup
= make_cleanup (free_delayed_list
, cu
);
7077 cu
->list_in_scope
= &file_symbols
;
7079 cu
->language
= pretend_language
;
7080 cu
->language_defn
= language_def (cu
->language
);
7082 /* The symbol tables are set up in read_type_unit_scope. */
7083 process_die (cu
->dies
, cu
);
7085 /* For now fudge the Go package. */
7086 if (cu
->language
== language_go
)
7087 fixup_go_packaging (cu
);
7089 /* Now that we have processed all the DIEs in the CU, all the types
7090 should be complete, and it should now be safe to compute all of the
7092 compute_delayed_physnames (cu
);
7093 do_cleanups (delayed_list_cleanup
);
7095 /* TUs share symbol tables.
7096 If this is the first TU to use this symtab, complete the construction
7097 of it with end_expandable_symtab. Otherwise, complete the addition of
7098 this TU's symbols to the existing symtab. */
7099 if (per_cu
->type_unit_group
->primary_symtab
== NULL
)
7101 symtab
= end_expandable_symtab (0, objfile
, SECT_OFF_TEXT (objfile
));
7102 per_cu
->type_unit_group
->primary_symtab
= symtab
;
7106 /* Set symtab language to language from DW_AT_language. If the
7107 compilation is from a C file generated by language preprocessors,
7108 do not set the language if it was already deduced by
7110 if (!(cu
->language
== language_c
&& symtab
->language
!= language_c
))
7111 symtab
->language
= cu
->language
;
7116 augment_type_symtab (objfile
,
7117 per_cu
->type_unit_group
->primary_symtab
);
7118 symtab
= per_cu
->type_unit_group
->primary_symtab
;
7121 if (dwarf2_per_objfile
->using_index
)
7122 per_cu
->v
.quick
->symtab
= symtab
;
7125 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
7126 pst
->symtab
= symtab
;
7130 do_cleanups (back_to
);
7133 /* Process an imported unit DIE. */
7136 process_imported_unit_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
7138 struct attribute
*attr
;
7140 /* For now we don't handle imported units in type units. */
7141 if (cu
->per_cu
->is_debug_types
)
7143 error (_("Dwarf Error: DW_TAG_imported_unit is not"
7144 " supported in type units [in module %s]"),
7148 attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
7151 struct dwarf2_per_cu_data
*per_cu
;
7152 struct symtab
*imported_symtab
;
7156 offset
= dwarf2_get_ref_die_offset (attr
);
7157 is_dwz
= (attr
->form
== DW_FORM_GNU_ref_alt
|| cu
->per_cu
->is_dwz
);
7158 per_cu
= dwarf2_find_containing_comp_unit (offset
, is_dwz
, cu
->objfile
);
7160 /* Queue the unit, if needed. */
7161 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
7162 load_full_comp_unit (per_cu
, cu
->language
);
7164 VEC_safe_push (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
,
7169 /* Process a die and its children. */
7172 process_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
7176 case DW_TAG_padding
:
7178 case DW_TAG_compile_unit
:
7179 case DW_TAG_partial_unit
:
7180 read_file_scope (die
, cu
);
7182 case DW_TAG_type_unit
:
7183 read_type_unit_scope (die
, cu
);
7185 case DW_TAG_subprogram
:
7186 case DW_TAG_inlined_subroutine
:
7187 read_func_scope (die
, cu
);
7189 case DW_TAG_lexical_block
:
7190 case DW_TAG_try_block
:
7191 case DW_TAG_catch_block
:
7192 read_lexical_block_scope (die
, cu
);
7194 case DW_TAG_GNU_call_site
:
7195 read_call_site_scope (die
, cu
);
7197 case DW_TAG_class_type
:
7198 case DW_TAG_interface_type
:
7199 case DW_TAG_structure_type
:
7200 case DW_TAG_union_type
:
7201 process_structure_scope (die
, cu
);
7203 case DW_TAG_enumeration_type
:
7204 process_enumeration_scope (die
, cu
);
7207 /* These dies have a type, but processing them does not create
7208 a symbol or recurse to process the children. Therefore we can
7209 read them on-demand through read_type_die. */
7210 case DW_TAG_subroutine_type
:
7211 case DW_TAG_set_type
:
7212 case DW_TAG_array_type
:
7213 case DW_TAG_pointer_type
:
7214 case DW_TAG_ptr_to_member_type
:
7215 case DW_TAG_reference_type
:
7216 case DW_TAG_string_type
:
7219 case DW_TAG_base_type
:
7220 case DW_TAG_subrange_type
:
7221 case DW_TAG_typedef
:
7222 /* Add a typedef symbol for the type definition, if it has a
7224 new_symbol (die
, read_type_die (die
, cu
), cu
);
7226 case DW_TAG_common_block
:
7227 read_common_block (die
, cu
);
7229 case DW_TAG_common_inclusion
:
7231 case DW_TAG_namespace
:
7232 cu
->processing_has_namespace_info
= 1;
7233 read_namespace (die
, cu
);
7236 cu
->processing_has_namespace_info
= 1;
7237 read_module (die
, cu
);
7239 case DW_TAG_imported_declaration
:
7240 case DW_TAG_imported_module
:
7241 cu
->processing_has_namespace_info
= 1;
7242 if (die
->child
!= NULL
&& (die
->tag
== DW_TAG_imported_declaration
7243 || cu
->language
!= language_fortran
))
7244 complaint (&symfile_complaints
, _("Tag '%s' has unexpected children"),
7245 dwarf_tag_name (die
->tag
));
7246 read_import_statement (die
, cu
);
7249 case DW_TAG_imported_unit
:
7250 process_imported_unit_die (die
, cu
);
7254 new_symbol (die
, NULL
, cu
);
7259 /* A helper function for dwarf2_compute_name which determines whether DIE
7260 needs to have the name of the scope prepended to the name listed in the
7264 die_needs_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
7266 struct attribute
*attr
;
7270 case DW_TAG_namespace
:
7271 case DW_TAG_typedef
:
7272 case DW_TAG_class_type
:
7273 case DW_TAG_interface_type
:
7274 case DW_TAG_structure_type
:
7275 case DW_TAG_union_type
:
7276 case DW_TAG_enumeration_type
:
7277 case DW_TAG_enumerator
:
7278 case DW_TAG_subprogram
:
7282 case DW_TAG_variable
:
7283 case DW_TAG_constant
:
7284 /* We only need to prefix "globally" visible variables. These include
7285 any variable marked with DW_AT_external or any variable that
7286 lives in a namespace. [Variables in anonymous namespaces
7287 require prefixing, but they are not DW_AT_external.] */
7289 if (dwarf2_attr (die
, DW_AT_specification
, cu
))
7291 struct dwarf2_cu
*spec_cu
= cu
;
7293 return die_needs_namespace (die_specification (die
, &spec_cu
),
7297 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
7298 if (attr
== NULL
&& die
->parent
->tag
!= DW_TAG_namespace
7299 && die
->parent
->tag
!= DW_TAG_module
)
7301 /* A variable in a lexical block of some kind does not need a
7302 namespace, even though in C++ such variables may be external
7303 and have a mangled name. */
7304 if (die
->parent
->tag
== DW_TAG_lexical_block
7305 || die
->parent
->tag
== DW_TAG_try_block
7306 || die
->parent
->tag
== DW_TAG_catch_block
7307 || die
->parent
->tag
== DW_TAG_subprogram
)
7316 /* Retrieve the last character from a mem_file. */
7319 do_ui_file_peek_last (void *object
, const char *buffer
, long length
)
7321 char *last_char_p
= (char *) object
;
7324 *last_char_p
= buffer
[length
- 1];
7327 /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero,
7328 compute the physname for the object, which include a method's:
7329 - formal parameters (C++/Java),
7330 - receiver type (Go),
7331 - return type (Java).
7333 The term "physname" is a bit confusing.
7334 For C++, for example, it is the demangled name.
7335 For Go, for example, it's the mangled name.
7337 For Ada, return the DIE's linkage name rather than the fully qualified
7338 name. PHYSNAME is ignored..
7340 The result is allocated on the objfile_obstack and canonicalized. */
7343 dwarf2_compute_name (const char *name
,
7344 struct die_info
*die
, struct dwarf2_cu
*cu
,
7347 struct objfile
*objfile
= cu
->objfile
;
7350 name
= dwarf2_name (die
, cu
);
7352 /* For Fortran GDB prefers DW_AT_*linkage_name if present but otherwise
7353 compute it by typename_concat inside GDB. */
7354 if (cu
->language
== language_ada
7355 || (cu
->language
== language_fortran
&& physname
))
7357 /* For Ada unit, we prefer the linkage name over the name, as
7358 the former contains the exported name, which the user expects
7359 to be able to reference. Ideally, we want the user to be able
7360 to reference this entity using either natural or linkage name,
7361 but we haven't started looking at this enhancement yet. */
7362 struct attribute
*attr
;
7364 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
7366 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
7367 if (attr
&& DW_STRING (attr
))
7368 return DW_STRING (attr
);
7371 /* These are the only languages we know how to qualify names in. */
7373 && (cu
->language
== language_cplus
|| cu
->language
== language_java
7374 || cu
->language
== language_fortran
))
7376 if (die_needs_namespace (die
, cu
))
7380 struct ui_file
*buf
;
7382 prefix
= determine_prefix (die
, cu
);
7383 buf
= mem_fileopen ();
7384 if (*prefix
!= '\0')
7386 char *prefixed_name
= typename_concat (NULL
, prefix
, name
,
7389 fputs_unfiltered (prefixed_name
, buf
);
7390 xfree (prefixed_name
);
7393 fputs_unfiltered (name
, buf
);
7395 /* Template parameters may be specified in the DIE's DW_AT_name, or
7396 as children with DW_TAG_template_type_param or
7397 DW_TAG_value_type_param. If the latter, add them to the name
7398 here. If the name already has template parameters, then
7399 skip this step; some versions of GCC emit both, and
7400 it is more efficient to use the pre-computed name.
7402 Something to keep in mind about this process: it is very
7403 unlikely, or in some cases downright impossible, to produce
7404 something that will match the mangled name of a function.
7405 If the definition of the function has the same debug info,
7406 we should be able to match up with it anyway. But fallbacks
7407 using the minimal symbol, for instance to find a method
7408 implemented in a stripped copy of libstdc++, will not work.
7409 If we do not have debug info for the definition, we will have to
7410 match them up some other way.
7412 When we do name matching there is a related problem with function
7413 templates; two instantiated function templates are allowed to
7414 differ only by their return types, which we do not add here. */
7416 if (cu
->language
== language_cplus
&& strchr (name
, '<') == NULL
)
7418 struct attribute
*attr
;
7419 struct die_info
*child
;
7422 die
->building_fullname
= 1;
7424 for (child
= die
->child
; child
!= NULL
; child
= child
->sibling
)
7429 struct dwarf2_locexpr_baton
*baton
;
7432 if (child
->tag
!= DW_TAG_template_type_param
7433 && child
->tag
!= DW_TAG_template_value_param
)
7438 fputs_unfiltered ("<", buf
);
7442 fputs_unfiltered (", ", buf
);
7444 attr
= dwarf2_attr (child
, DW_AT_type
, cu
);
7447 complaint (&symfile_complaints
,
7448 _("template parameter missing DW_AT_type"));
7449 fputs_unfiltered ("UNKNOWN_TYPE", buf
);
7452 type
= die_type (child
, cu
);
7454 if (child
->tag
== DW_TAG_template_type_param
)
7456 c_print_type (type
, "", buf
, -1, 0, &type_print_raw_options
);
7460 attr
= dwarf2_attr (child
, DW_AT_const_value
, cu
);
7463 complaint (&symfile_complaints
,
7464 _("template parameter missing "
7465 "DW_AT_const_value"));
7466 fputs_unfiltered ("UNKNOWN_VALUE", buf
);
7470 dwarf2_const_value_attr (attr
, type
, name
,
7471 &cu
->comp_unit_obstack
, cu
,
7472 &value
, &bytes
, &baton
);
7474 if (TYPE_NOSIGN (type
))
7475 /* GDB prints characters as NUMBER 'CHAR'. If that's
7476 changed, this can use value_print instead. */
7477 c_printchar (value
, type
, buf
);
7480 struct value_print_options opts
;
7483 v
= dwarf2_evaluate_loc_desc (type
, NULL
,
7487 else if (bytes
!= NULL
)
7489 v
= allocate_value (type
);
7490 memcpy (value_contents_writeable (v
), bytes
,
7491 TYPE_LENGTH (type
));
7494 v
= value_from_longest (type
, value
);
7496 /* Specify decimal so that we do not depend on
7498 get_formatted_print_options (&opts
, 'd');
7500 value_print (v
, buf
, &opts
);
7506 die
->building_fullname
= 0;
7510 /* Close the argument list, with a space if necessary
7511 (nested templates). */
7512 char last_char
= '\0';
7513 ui_file_put (buf
, do_ui_file_peek_last
, &last_char
);
7514 if (last_char
== '>')
7515 fputs_unfiltered (" >", buf
);
7517 fputs_unfiltered (">", buf
);
7521 /* For Java and C++ methods, append formal parameter type
7522 information, if PHYSNAME. */
7524 if (physname
&& die
->tag
== DW_TAG_subprogram
7525 && (cu
->language
== language_cplus
7526 || cu
->language
== language_java
))
7528 struct type
*type
= read_type_die (die
, cu
);
7530 c_type_print_args (type
, buf
, 1, cu
->language
,
7531 &type_print_raw_options
);
7533 if (cu
->language
== language_java
)
7535 /* For java, we must append the return type to method
7537 if (die
->tag
== DW_TAG_subprogram
)
7538 java_print_type (TYPE_TARGET_TYPE (type
), "", buf
,
7539 0, 0, &type_print_raw_options
);
7541 else if (cu
->language
== language_cplus
)
7543 /* Assume that an artificial first parameter is
7544 "this", but do not crash if it is not. RealView
7545 marks unnamed (and thus unused) parameters as
7546 artificial; there is no way to differentiate
7548 if (TYPE_NFIELDS (type
) > 0
7549 && TYPE_FIELD_ARTIFICIAL (type
, 0)
7550 && TYPE_CODE (TYPE_FIELD_TYPE (type
, 0)) == TYPE_CODE_PTR
7551 && TYPE_CONST (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type
,
7553 fputs_unfiltered (" const", buf
);
7557 name
= ui_file_obsavestring (buf
, &objfile
->objfile_obstack
,
7559 ui_file_delete (buf
);
7561 if (cu
->language
== language_cplus
)
7564 = dwarf2_canonicalize_name (name
, cu
,
7565 &objfile
->objfile_obstack
);
7576 /* Return the fully qualified name of DIE, based on its DW_AT_name.
7577 If scope qualifiers are appropriate they will be added. The result
7578 will be allocated on the objfile_obstack, or NULL if the DIE does
7579 not have a name. NAME may either be from a previous call to
7580 dwarf2_name or NULL.
7582 The output string will be canonicalized (if C++/Java). */
7585 dwarf2_full_name (const char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
7587 return dwarf2_compute_name (name
, die
, cu
, 0);
7590 /* Construct a physname for the given DIE in CU. NAME may either be
7591 from a previous call to dwarf2_name or NULL. The result will be
7592 allocated on the objfile_objstack or NULL if the DIE does not have a
7595 The output string will be canonicalized (if C++/Java). */
7598 dwarf2_physname (const char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
7600 struct objfile
*objfile
= cu
->objfile
;
7601 struct attribute
*attr
;
7602 const char *retval
, *mangled
= NULL
, *canon
= NULL
;
7603 struct cleanup
*back_to
;
7606 /* In this case dwarf2_compute_name is just a shortcut not building anything
7608 if (!die_needs_namespace (die
, cu
))
7609 return dwarf2_compute_name (name
, die
, cu
, 1);
7611 back_to
= make_cleanup (null_cleanup
, NULL
);
7613 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
7615 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
7617 /* DW_AT_linkage_name is missing in some cases - depend on what GDB
7619 if (attr
&& DW_STRING (attr
))
7623 mangled
= DW_STRING (attr
);
7625 /* Use DMGL_RET_DROP for C++ template functions to suppress their return
7626 type. It is easier for GDB users to search for such functions as
7627 `name(params)' than `long name(params)'. In such case the minimal
7628 symbol names do not match the full symbol names but for template
7629 functions there is never a need to look up their definition from their
7630 declaration so the only disadvantage remains the minimal symbol
7631 variant `long name(params)' does not have the proper inferior type.
7634 if (cu
->language
== language_go
)
7636 /* This is a lie, but we already lie to the caller new_symbol_full.
7637 new_symbol_full assumes we return the mangled name.
7638 This just undoes that lie until things are cleaned up. */
7643 demangled
= cplus_demangle (mangled
,
7644 (DMGL_PARAMS
| DMGL_ANSI
7645 | (cu
->language
== language_java
7646 ? DMGL_JAVA
| DMGL_RET_POSTFIX
7651 make_cleanup (xfree
, demangled
);
7661 if (canon
== NULL
|| check_physname
)
7663 const char *physname
= dwarf2_compute_name (name
, die
, cu
, 1);
7665 if (canon
!= NULL
&& strcmp (physname
, canon
) != 0)
7667 /* It may not mean a bug in GDB. The compiler could also
7668 compute DW_AT_linkage_name incorrectly. But in such case
7669 GDB would need to be bug-to-bug compatible. */
7671 complaint (&symfile_complaints
,
7672 _("Computed physname <%s> does not match demangled <%s> "
7673 "(from linkage <%s>) - DIE at 0x%x [in module %s]"),
7674 physname
, canon
, mangled
, die
->offset
.sect_off
, objfile
->name
);
7676 /* Prefer DW_AT_linkage_name (in the CANON form) - when it
7677 is available here - over computed PHYSNAME. It is safer
7678 against both buggy GDB and buggy compilers. */
7692 retval
= obstack_copy0 (&objfile
->objfile_obstack
, retval
, strlen (retval
));
7694 do_cleanups (back_to
);
7698 /* Read the import statement specified by the given die and record it. */
7701 read_import_statement (struct die_info
*die
, struct dwarf2_cu
*cu
)
7703 struct objfile
*objfile
= cu
->objfile
;
7704 struct attribute
*import_attr
;
7705 struct die_info
*imported_die
, *child_die
;
7706 struct dwarf2_cu
*imported_cu
;
7707 const char *imported_name
;
7708 const char *imported_name_prefix
;
7709 const char *canonical_name
;
7710 const char *import_alias
;
7711 const char *imported_declaration
= NULL
;
7712 const char *import_prefix
;
7713 VEC (const_char_ptr
) *excludes
= NULL
;
7714 struct cleanup
*cleanups
;
7716 import_attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
7717 if (import_attr
== NULL
)
7719 complaint (&symfile_complaints
, _("Tag '%s' has no DW_AT_import"),
7720 dwarf_tag_name (die
->tag
));
7725 imported_die
= follow_die_ref_or_sig (die
, import_attr
, &imported_cu
);
7726 imported_name
= dwarf2_name (imported_die
, imported_cu
);
7727 if (imported_name
== NULL
)
7729 /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524
7731 The import in the following code:
7745 <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration)
7746 <52> DW_AT_decl_file : 1
7747 <53> DW_AT_decl_line : 6
7748 <54> DW_AT_import : <0x75>
7749 <2><58>: Abbrev Number: 4 (DW_TAG_typedef)
7751 <5b> DW_AT_decl_file : 1
7752 <5c> DW_AT_decl_line : 2
7753 <5d> DW_AT_type : <0x6e>
7755 <1><75>: Abbrev Number: 7 (DW_TAG_base_type)
7756 <76> DW_AT_byte_size : 4
7757 <77> DW_AT_encoding : 5 (signed)
7759 imports the wrong die ( 0x75 instead of 0x58 ).
7760 This case will be ignored until the gcc bug is fixed. */
7764 /* Figure out the local name after import. */
7765 import_alias
= dwarf2_name (die
, cu
);
7767 /* Figure out where the statement is being imported to. */
7768 import_prefix
= determine_prefix (die
, cu
);
7770 /* Figure out what the scope of the imported die is and prepend it
7771 to the name of the imported die. */
7772 imported_name_prefix
= determine_prefix (imported_die
, imported_cu
);
7774 if (imported_die
->tag
!= DW_TAG_namespace
7775 && imported_die
->tag
!= DW_TAG_module
)
7777 imported_declaration
= imported_name
;
7778 canonical_name
= imported_name_prefix
;
7780 else if (strlen (imported_name_prefix
) > 0)
7781 canonical_name
= obconcat (&objfile
->objfile_obstack
,
7782 imported_name_prefix
, "::", imported_name
,
7785 canonical_name
= imported_name
;
7787 cleanups
= make_cleanup (VEC_cleanup (const_char_ptr
), &excludes
);
7789 if (die
->tag
== DW_TAG_imported_module
&& cu
->language
== language_fortran
)
7790 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
7791 child_die
= sibling_die (child_die
))
7793 /* DWARF-4: A Fortran use statement with a “rename list” may be
7794 represented by an imported module entry with an import attribute
7795 referring to the module and owned entries corresponding to those
7796 entities that are renamed as part of being imported. */
7798 if (child_die
->tag
!= DW_TAG_imported_declaration
)
7800 complaint (&symfile_complaints
,
7801 _("child DW_TAG_imported_declaration expected "
7802 "- DIE at 0x%x [in module %s]"),
7803 child_die
->offset
.sect_off
, objfile
->name
);
7807 import_attr
= dwarf2_attr (child_die
, DW_AT_import
, cu
);
7808 if (import_attr
== NULL
)
7810 complaint (&symfile_complaints
, _("Tag '%s' has no DW_AT_import"),
7811 dwarf_tag_name (child_die
->tag
));
7816 imported_die
= follow_die_ref_or_sig (child_die
, import_attr
,
7818 imported_name
= dwarf2_name (imported_die
, imported_cu
);
7819 if (imported_name
== NULL
)
7821 complaint (&symfile_complaints
,
7822 _("child DW_TAG_imported_declaration has unknown "
7823 "imported name - DIE at 0x%x [in module %s]"),
7824 child_die
->offset
.sect_off
, objfile
->name
);
7828 VEC_safe_push (const_char_ptr
, excludes
, imported_name
);
7830 process_die (child_die
, cu
);
7833 cp_add_using_directive (import_prefix
,
7836 imported_declaration
,
7839 &objfile
->objfile_obstack
);
7841 do_cleanups (cleanups
);
7844 /* Cleanup function for handle_DW_AT_stmt_list. */
7847 free_cu_line_header (void *arg
)
7849 struct dwarf2_cu
*cu
= arg
;
7851 free_line_header (cu
->line_header
);
7852 cu
->line_header
= NULL
;
7855 /* Check for possibly missing DW_AT_comp_dir with relative .debug_line
7856 directory paths. GCC SVN r127613 (new option -fdebug-prefix-map) fixed
7857 this, it was first present in GCC release 4.3.0. */
7860 producer_is_gcc_lt_4_3 (struct dwarf2_cu
*cu
)
7862 if (!cu
->checked_producer
)
7863 check_producer (cu
);
7865 return cu
->producer_is_gcc_lt_4_3
;
7869 find_file_and_directory (struct die_info
*die
, struct dwarf2_cu
*cu
,
7870 const char **name
, const char **comp_dir
)
7872 struct attribute
*attr
;
7877 /* Find the filename. Do not use dwarf2_name here, since the filename
7878 is not a source language identifier. */
7879 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
7882 *name
= DW_STRING (attr
);
7885 attr
= dwarf2_attr (die
, DW_AT_comp_dir
, cu
);
7887 *comp_dir
= DW_STRING (attr
);
7888 else if (producer_is_gcc_lt_4_3 (cu
) && *name
!= NULL
7889 && IS_ABSOLUTE_PATH (*name
))
7891 char *d
= ldirname (*name
);
7895 make_cleanup (xfree
, d
);
7897 if (*comp_dir
!= NULL
)
7899 /* Irix 6.2 native cc prepends <machine>.: to the compilation
7900 directory, get rid of it. */
7901 char *cp
= strchr (*comp_dir
, ':');
7903 if (cp
&& cp
!= *comp_dir
&& cp
[-1] == '.' && cp
[1] == '/')
7908 *name
= "<unknown>";
7911 /* Handle DW_AT_stmt_list for a compilation unit.
7912 DIE is the DW_TAG_compile_unit die for CU.
7913 COMP_DIR is the compilation directory.
7914 WANT_LINE_INFO is non-zero if the pc/line-number mapping is needed. */
7917 handle_DW_AT_stmt_list (struct die_info
*die
, struct dwarf2_cu
*cu
,
7918 const char *comp_dir
)
7920 struct attribute
*attr
;
7922 gdb_assert (! cu
->per_cu
->is_debug_types
);
7924 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
7927 unsigned int line_offset
= DW_UNSND (attr
);
7928 struct line_header
*line_header
7929 = dwarf_decode_line_header (line_offset
, cu
);
7933 cu
->line_header
= line_header
;
7934 make_cleanup (free_cu_line_header
, cu
);
7935 dwarf_decode_lines (line_header
, comp_dir
, cu
, NULL
, 1);
7940 /* Process DW_TAG_compile_unit or DW_TAG_partial_unit. */
7943 read_file_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
7945 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7946 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
7947 CORE_ADDR lowpc
= ((CORE_ADDR
) -1);
7948 CORE_ADDR highpc
= ((CORE_ADDR
) 0);
7949 struct attribute
*attr
;
7950 const char *name
= NULL
;
7951 const char *comp_dir
= NULL
;
7952 struct die_info
*child_die
;
7953 bfd
*abfd
= objfile
->obfd
;
7956 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
7958 get_scope_pc_bounds (die
, &lowpc
, &highpc
, cu
);
7960 /* If we didn't find a lowpc, set it to highpc to avoid complaints
7961 from finish_block. */
7962 if (lowpc
== ((CORE_ADDR
) -1))
7967 find_file_and_directory (die
, cu
, &name
, &comp_dir
);
7969 prepare_one_comp_unit (cu
, die
, cu
->language
);
7971 /* The XLCL doesn't generate DW_LANG_OpenCL because this attribute is not
7972 standardised yet. As a workaround for the language detection we fall
7973 back to the DW_AT_producer string. */
7974 if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL") != NULL
)
7975 cu
->language
= language_opencl
;
7977 /* Similar hack for Go. */
7978 if (cu
->producer
&& strstr (cu
->producer
, "GNU Go ") != NULL
)
7979 set_cu_language (DW_LANG_Go
, cu
);
7981 dwarf2_start_symtab (cu
, name
, comp_dir
, lowpc
);
7983 /* Decode line number information if present. We do this before
7984 processing child DIEs, so that the line header table is available
7985 for DW_AT_decl_file. */
7986 handle_DW_AT_stmt_list (die
, cu
, comp_dir
);
7988 /* Process all dies in compilation unit. */
7989 if (die
->child
!= NULL
)
7991 child_die
= die
->child
;
7992 while (child_die
&& child_die
->tag
)
7994 process_die (child_die
, cu
);
7995 child_die
= sibling_die (child_die
);
7999 /* Decode macro information, if present. Dwarf 2 macro information
8000 refers to information in the line number info statement program
8001 header, so we can only read it if we've read the header
8003 attr
= dwarf2_attr (die
, DW_AT_GNU_macros
, cu
);
8004 if (attr
&& cu
->line_header
)
8006 if (dwarf2_attr (die
, DW_AT_macro_info
, cu
))
8007 complaint (&symfile_complaints
,
8008 _("CU refers to both DW_AT_GNU_macros and DW_AT_macro_info"));
8010 dwarf_decode_macros (cu
, DW_UNSND (attr
), comp_dir
, 1);
8014 attr
= dwarf2_attr (die
, DW_AT_macro_info
, cu
);
8015 if (attr
&& cu
->line_header
)
8017 unsigned int macro_offset
= DW_UNSND (attr
);
8019 dwarf_decode_macros (cu
, macro_offset
, comp_dir
, 0);
8023 do_cleanups (back_to
);
8026 /* TU version of handle_DW_AT_stmt_list for read_type_unit_scope.
8027 Create the set of symtabs used by this TU, or if this TU is sharing
8028 symtabs with another TU and the symtabs have already been created
8029 then restore those symtabs in the line header.
8030 We don't need the pc/line-number mapping for type units. */
8033 setup_type_unit_groups (struct die_info
*die
, struct dwarf2_cu
*cu
)
8035 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8036 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
8037 struct type_unit_group
*tu_group
;
8039 struct line_header
*lh
;
8040 struct attribute
*attr
;
8041 unsigned int i
, line_offset
;
8043 gdb_assert (per_cu
->is_debug_types
);
8045 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
8047 /* If we're using .gdb_index (includes -readnow) then
8048 per_cu->s.type_unit_group may not have been set up yet. */
8049 if (per_cu
->type_unit_group
== NULL
)
8050 per_cu
->type_unit_group
= get_type_unit_group (cu
, attr
);
8051 tu_group
= per_cu
->type_unit_group
;
8053 /* If we've already processed this stmt_list there's no real need to
8054 do it again, we could fake it and just recreate the part we need
8055 (file name,index -> symtab mapping). If data shows this optimization
8056 is useful we can do it then. */
8057 first_time
= tu_group
->primary_symtab
== NULL
;
8059 /* We have to handle the case of both a missing DW_AT_stmt_list or bad
8064 line_offset
= DW_UNSND (attr
);
8065 lh
= dwarf_decode_line_header (line_offset
, cu
);
8070 dwarf2_start_symtab (cu
, "", NULL
, 0);
8073 gdb_assert (tu_group
->symtabs
== NULL
);
8076 /* Note: The primary symtab will get allocated at the end. */
8080 cu
->line_header
= lh
;
8081 make_cleanup (free_cu_line_header
, cu
);
8085 dwarf2_start_symtab (cu
, "", NULL
, 0);
8087 tu_group
->num_symtabs
= lh
->num_file_names
;
8088 tu_group
->symtabs
= XNEWVEC (struct symtab
*, lh
->num_file_names
);
8090 for (i
= 0; i
< lh
->num_file_names
; ++i
)
8093 struct file_entry
*fe
= &lh
->file_names
[i
];
8096 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
8097 dwarf2_start_subfile (fe
->name
, dir
, NULL
);
8099 /* Note: We don't have to watch for the main subfile here, type units
8100 don't have DW_AT_name. */
8102 if (current_subfile
->symtab
== NULL
)
8104 /* NOTE: start_subfile will recognize when it's been passed
8105 a file it has already seen. So we can't assume there's a
8106 simple mapping from lh->file_names to subfiles,
8107 lh->file_names may contain dups. */
8108 current_subfile
->symtab
= allocate_symtab (current_subfile
->name
,
8112 fe
->symtab
= current_subfile
->symtab
;
8113 tu_group
->symtabs
[i
] = fe
->symtab
;
8120 for (i
= 0; i
< lh
->num_file_names
; ++i
)
8122 struct file_entry
*fe
= &lh
->file_names
[i
];
8124 fe
->symtab
= tu_group
->symtabs
[i
];
8128 /* The main symtab is allocated last. Type units don't have DW_AT_name
8129 so they don't have a "real" (so to speak) symtab anyway.
8130 There is later code that will assign the main symtab to all symbols
8131 that don't have one. We need to handle the case of a symbol with a
8132 missing symtab (DW_AT_decl_file) anyway. */
8135 /* Process DW_TAG_type_unit.
8136 For TUs we want to skip the first top level sibling if it's not the
8137 actual type being defined by this TU. In this case the first top
8138 level sibling is there to provide context only. */
8141 read_type_unit_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
8143 struct die_info
*child_die
;
8145 prepare_one_comp_unit (cu
, die
, language_minimal
);
8147 /* Initialize (or reinitialize) the machinery for building symtabs.
8148 We do this before processing child DIEs, so that the line header table
8149 is available for DW_AT_decl_file. */
8150 setup_type_unit_groups (die
, cu
);
8152 if (die
->child
!= NULL
)
8154 child_die
= die
->child
;
8155 while (child_die
&& child_die
->tag
)
8157 process_die (child_die
, cu
);
8158 child_die
= sibling_die (child_die
);
8165 http://gcc.gnu.org/wiki/DebugFission
8166 http://gcc.gnu.org/wiki/DebugFissionDWP
8168 To simplify handling of both DWO files ("object" files with the DWARF info)
8169 and DWP files (a file with the DWOs packaged up into one file), we treat
8170 DWP files as having a collection of virtual DWO files. */
8173 hash_dwo_file (const void *item
)
8175 const struct dwo_file
*dwo_file
= item
;
8177 return htab_hash_string (dwo_file
->name
);
8181 eq_dwo_file (const void *item_lhs
, const void *item_rhs
)
8183 const struct dwo_file
*lhs
= item_lhs
;
8184 const struct dwo_file
*rhs
= item_rhs
;
8186 return strcmp (lhs
->name
, rhs
->name
) == 0;
8189 /* Allocate a hash table for DWO files. */
8192 allocate_dwo_file_hash_table (void)
8194 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8196 return htab_create_alloc_ex (41,
8200 &objfile
->objfile_obstack
,
8201 hashtab_obstack_allocate
,
8202 dummy_obstack_deallocate
);
8205 /* Lookup DWO file DWO_NAME. */
8208 lookup_dwo_file_slot (const char *dwo_name
)
8210 struct dwo_file find_entry
;
8213 if (dwarf2_per_objfile
->dwo_files
== NULL
)
8214 dwarf2_per_objfile
->dwo_files
= allocate_dwo_file_hash_table ();
8216 memset (&find_entry
, 0, sizeof (find_entry
));
8217 find_entry
.name
= dwo_name
;
8218 slot
= htab_find_slot (dwarf2_per_objfile
->dwo_files
, &find_entry
, INSERT
);
8224 hash_dwo_unit (const void *item
)
8226 const struct dwo_unit
*dwo_unit
= item
;
8228 /* This drops the top 32 bits of the id, but is ok for a hash. */
8229 return dwo_unit
->signature
;
8233 eq_dwo_unit (const void *item_lhs
, const void *item_rhs
)
8235 const struct dwo_unit
*lhs
= item_lhs
;
8236 const struct dwo_unit
*rhs
= item_rhs
;
8238 /* The signature is assumed to be unique within the DWO file.
8239 So while object file CU dwo_id's always have the value zero,
8240 that's OK, assuming each object file DWO file has only one CU,
8241 and that's the rule for now. */
8242 return lhs
->signature
== rhs
->signature
;
8245 /* Allocate a hash table for DWO CUs,TUs.
8246 There is one of these tables for each of CUs,TUs for each DWO file. */
8249 allocate_dwo_unit_table (struct objfile
*objfile
)
8251 /* Start out with a pretty small number.
8252 Generally DWO files contain only one CU and maybe some TUs. */
8253 return htab_create_alloc_ex (3,
8257 &objfile
->objfile_obstack
,
8258 hashtab_obstack_allocate
,
8259 dummy_obstack_deallocate
);
8262 /* Structure used to pass data to create_dwo_debug_info_hash_table_reader. */
8264 struct create_dwo_info_table_data
8266 struct dwo_file
*dwo_file
;
8270 /* die_reader_func for create_dwo_debug_info_hash_table. */
8273 create_dwo_debug_info_hash_table_reader (const struct die_reader_specs
*reader
,
8275 struct die_info
*comp_unit_die
,
8279 struct dwarf2_cu
*cu
= reader
->cu
;
8280 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8281 sect_offset offset
= cu
->per_cu
->offset
;
8282 struct dwarf2_section_info
*section
= cu
->per_cu
->info_or_types_section
;
8283 struct create_dwo_info_table_data
*data
= datap
;
8284 struct dwo_file
*dwo_file
= data
->dwo_file
;
8285 htab_t cu_htab
= data
->cu_htab
;
8287 struct attribute
*attr
;
8288 struct dwo_unit
*dwo_unit
;
8290 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_id
, cu
);
8293 error (_("Dwarf Error: debug entry at offset 0x%x is missing"
8294 " its dwo_id [in module %s]"),
8295 offset
.sect_off
, dwo_file
->name
);
8299 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
8300 dwo_unit
->dwo_file
= dwo_file
;
8301 dwo_unit
->signature
= DW_UNSND (attr
);
8302 dwo_unit
->info_or_types_section
= section
;
8303 dwo_unit
->offset
= offset
;
8304 dwo_unit
->length
= cu
->per_cu
->length
;
8306 slot
= htab_find_slot (cu_htab
, dwo_unit
, INSERT
);
8307 gdb_assert (slot
!= NULL
);
8310 const struct dwo_unit
*dup_dwo_unit
= *slot
;
8312 complaint (&symfile_complaints
,
8313 _("debug entry at offset 0x%x is duplicate to the entry at"
8314 " offset 0x%x, dwo_id 0x%s [in module %s]"),
8315 offset
.sect_off
, dup_dwo_unit
->offset
.sect_off
,
8316 phex (dwo_unit
->signature
, sizeof (dwo_unit
->signature
)),
8322 if (dwarf2_read_debug
)
8323 fprintf_unfiltered (gdb_stdlog
, " offset 0x%x, dwo_id 0x%s\n",
8325 phex (dwo_unit
->signature
,
8326 sizeof (dwo_unit
->signature
)));
8329 /* Create a hash table to map DWO IDs to their CU entry in
8330 .debug_info.dwo in DWO_FILE.
8331 Note: This function processes DWO files only, not DWP files. */
8334 create_dwo_debug_info_hash_table (struct dwo_file
*dwo_file
)
8336 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8337 struct dwarf2_section_info
*section
= &dwo_file
->sections
.info
;
8340 gdb_byte
*info_ptr
, *end_ptr
;
8341 struct create_dwo_info_table_data create_dwo_info_table_data
;
8343 dwarf2_read_section (objfile
, section
);
8344 info_ptr
= section
->buffer
;
8346 if (info_ptr
== NULL
)
8349 /* We can't set abfd until now because the section may be empty or
8350 not present, in which case section->asection will be NULL. */
8351 abfd
= section
->asection
->owner
;
8353 if (dwarf2_read_debug
)
8354 fprintf_unfiltered (gdb_stdlog
, "Reading .debug_info.dwo for %s:\n",
8355 bfd_get_filename (abfd
));
8357 cu_htab
= allocate_dwo_unit_table (objfile
);
8359 create_dwo_info_table_data
.dwo_file
= dwo_file
;
8360 create_dwo_info_table_data
.cu_htab
= cu_htab
;
8362 end_ptr
= info_ptr
+ section
->size
;
8363 while (info_ptr
< end_ptr
)
8365 struct dwarf2_per_cu_data per_cu
;
8367 memset (&per_cu
, 0, sizeof (per_cu
));
8368 per_cu
.objfile
= objfile
;
8369 per_cu
.is_debug_types
= 0;
8370 per_cu
.offset
.sect_off
= info_ptr
- section
->buffer
;
8371 per_cu
.info_or_types_section
= section
;
8373 init_cutu_and_read_dies_no_follow (&per_cu
,
8374 &dwo_file
->sections
.abbrev
,
8376 create_dwo_debug_info_hash_table_reader
,
8377 &create_dwo_info_table_data
);
8379 info_ptr
+= per_cu
.length
;
8385 /* DWP file .debug_{cu,tu}_index section format:
8386 [ref: http://gcc.gnu.org/wiki/DebugFissionDWP]
8388 Both index sections have the same format, and serve to map a 64-bit
8389 signature to a set of section numbers. Each section begins with a header,
8390 followed by a hash table of 64-bit signatures, a parallel table of 32-bit
8391 indexes, and a pool of 32-bit section numbers. The index sections will be
8392 aligned at 8-byte boundaries in the file.
8394 The index section header contains two unsigned 32-bit values (using the
8395 byte order of the application binary):
8397 N, the number of compilation units or type units in the index
8398 M, the number of slots in the hash table
8400 (We assume that N and M will not exceed 2^32 - 1.)
8402 The size of the hash table, M, must be 2^k such that 2^k > 3*N/2.
8404 The hash table begins at offset 8 in the section, and consists of an array
8405 of M 64-bit slots. Each slot contains a 64-bit signature (using the byte
8406 order of the application binary). Unused slots in the hash table are 0.
8407 (We rely on the extreme unlikeliness of a signature being exactly 0.)
8409 The parallel table begins immediately after the hash table
8410 (at offset 8 + 8 * M from the beginning of the section), and consists of an
8411 array of 32-bit indexes (using the byte order of the application binary),
8412 corresponding 1-1 with slots in the hash table. Each entry in the parallel
8413 table contains a 32-bit index into the pool of section numbers. For unused
8414 hash table slots, the corresponding entry in the parallel table will be 0.
8416 Given a 64-bit compilation unit signature or a type signature S, an entry
8417 in the hash table is located as follows:
8419 1) Calculate a primary hash H = S & MASK(k), where MASK(k) is a mask with
8420 the low-order k bits all set to 1.
8422 2) Calculate a secondary hash H' = (((S >> 32) & MASK(k)) | 1).
8424 3) If the hash table entry at index H matches the signature, use that
8425 entry. If the hash table entry at index H is unused (all zeroes),
8426 terminate the search: the signature is not present in the table.
8428 4) Let H = (H + H') modulo M. Repeat at Step 3.
8430 Because M > N and H' and M are relatively prime, the search is guaranteed
8431 to stop at an unused slot or find the match.
8433 The pool of section numbers begins immediately following the hash table
8434 (at offset 8 + 12 * M from the beginning of the section). The pool of
8435 section numbers consists of an array of 32-bit words (using the byte order
8436 of the application binary). Each item in the array is indexed starting
8437 from 0. The hash table entry provides the index of the first section
8438 number in the set. Additional section numbers in the set follow, and the
8439 set is terminated by a 0 entry (section number 0 is not used in ELF).
8441 In each set of section numbers, the .debug_info.dwo or .debug_types.dwo
8442 section must be the first entry in the set, and the .debug_abbrev.dwo must
8443 be the second entry. Other members of the set may follow in any order. */
8445 /* Create a hash table to map DWO IDs to their CU/TU entry in
8446 .debug_{info,types}.dwo in DWP_FILE.
8447 Returns NULL if there isn't one.
8448 Note: This function processes DWP files only, not DWO files. */
8450 static struct dwp_hash_table
*
8451 create_dwp_hash_table (struct dwp_file
*dwp_file
, int is_debug_types
)
8453 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8454 bfd
*dbfd
= dwp_file
->dbfd
;
8455 char *index_ptr
, *index_end
;
8456 struct dwarf2_section_info
*index
;
8457 uint32_t version
, nr_units
, nr_slots
;
8458 struct dwp_hash_table
*htab
;
8461 index
= &dwp_file
->sections
.tu_index
;
8463 index
= &dwp_file
->sections
.cu_index
;
8465 if (dwarf2_section_empty_p (index
))
8467 dwarf2_read_section (objfile
, index
);
8469 index_ptr
= index
->buffer
;
8470 index_end
= index_ptr
+ index
->size
;
8472 version
= read_4_bytes (dbfd
, index_ptr
);
8473 index_ptr
+= 8; /* Skip the unused word. */
8474 nr_units
= read_4_bytes (dbfd
, index_ptr
);
8476 nr_slots
= read_4_bytes (dbfd
, index_ptr
);
8481 error (_("Dwarf Error: unsupported DWP file version (%u)"
8483 version
, dwp_file
->name
);
8485 if (nr_slots
!= (nr_slots
& -nr_slots
))
8487 error (_("Dwarf Error: number of slots in DWP hash table (%u)"
8488 " is not power of 2 [in module %s]"),
8489 nr_slots
, dwp_file
->name
);
8492 htab
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwp_hash_table
);
8493 htab
->nr_units
= nr_units
;
8494 htab
->nr_slots
= nr_slots
;
8495 htab
->hash_table
= index_ptr
;
8496 htab
->unit_table
= htab
->hash_table
+ sizeof (uint64_t) * nr_slots
;
8497 htab
->section_pool
= htab
->unit_table
+ sizeof (uint32_t) * nr_slots
;
8502 /* Update SECTIONS with the data from SECTP.
8504 This function is like the other "locate" section routines that are
8505 passed to bfd_map_over_sections, but in this context the sections to
8506 read comes from the DWP hash table, not the full ELF section table.
8508 The result is non-zero for success, or zero if an error was found. */
8511 locate_virtual_dwo_sections (asection
*sectp
,
8512 struct virtual_dwo_sections
*sections
)
8514 const struct dwop_section_names
*names
= &dwop_section_names
;
8516 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
8518 /* There can be only one. */
8519 if (sections
->abbrev
.asection
!= NULL
)
8521 sections
->abbrev
.asection
= sectp
;
8522 sections
->abbrev
.size
= bfd_get_section_size (sectp
);
8524 else if (section_is_p (sectp
->name
, &names
->info_dwo
)
8525 || section_is_p (sectp
->name
, &names
->types_dwo
))
8527 /* There can be only one. */
8528 if (sections
->info_or_types
.asection
!= NULL
)
8530 sections
->info_or_types
.asection
= sectp
;
8531 sections
->info_or_types
.size
= bfd_get_section_size (sectp
);
8533 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
8535 /* There can be only one. */
8536 if (sections
->line
.asection
!= NULL
)
8538 sections
->line
.asection
= sectp
;
8539 sections
->line
.size
= bfd_get_section_size (sectp
);
8541 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
8543 /* There can be only one. */
8544 if (sections
->loc
.asection
!= NULL
)
8546 sections
->loc
.asection
= sectp
;
8547 sections
->loc
.size
= bfd_get_section_size (sectp
);
8549 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
8551 /* There can be only one. */
8552 if (sections
->macinfo
.asection
!= NULL
)
8554 sections
->macinfo
.asection
= sectp
;
8555 sections
->macinfo
.size
= bfd_get_section_size (sectp
);
8557 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
8559 /* There can be only one. */
8560 if (sections
->macro
.asection
!= NULL
)
8562 sections
->macro
.asection
= sectp
;
8563 sections
->macro
.size
= bfd_get_section_size (sectp
);
8565 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
8567 /* There can be only one. */
8568 if (sections
->str_offsets
.asection
!= NULL
)
8570 sections
->str_offsets
.asection
= sectp
;
8571 sections
->str_offsets
.size
= bfd_get_section_size (sectp
);
8575 /* No other kind of section is valid. */
8582 /* Create a dwo_unit object for the DWO with signature SIGNATURE.
8583 HTAB is the hash table from the DWP file.
8584 SECTION_INDEX is the index of the DWO in HTAB. */
8586 static struct dwo_unit
*
8587 create_dwo_in_dwp (struct dwp_file
*dwp_file
,
8588 const struct dwp_hash_table
*htab
,
8589 uint32_t section_index
,
8590 ULONGEST signature
, int is_debug_types
)
8592 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8593 bfd
*dbfd
= dwp_file
->dbfd
;
8594 const char *kind
= is_debug_types
? "TU" : "CU";
8595 struct dwo_file
*dwo_file
;
8596 struct dwo_unit
*dwo_unit
;
8597 struct virtual_dwo_sections sections
;
8598 void **dwo_file_slot
;
8599 char *virtual_dwo_name
;
8600 struct dwarf2_section_info
*cutu
;
8601 struct cleanup
*cleanups
;
8604 if (dwarf2_read_debug
)
8606 fprintf_unfiltered (gdb_stdlog
, "Reading %s %u/0x%s in DWP file: %s\n",
8608 section_index
, phex (signature
, sizeof (signature
)),
8612 /* Fetch the sections of this DWO.
8613 Put a limit on the number of sections we look for so that bad data
8614 doesn't cause us to loop forever. */
8616 #define MAX_NR_DWO_SECTIONS \
8617 (1 /* .debug_info or .debug_types */ \
8618 + 1 /* .debug_abbrev */ \
8619 + 1 /* .debug_line */ \
8620 + 1 /* .debug_loc */ \
8621 + 1 /* .debug_str_offsets */ \
8622 + 1 /* .debug_macro */ \
8623 + 1 /* .debug_macinfo */ \
8624 + 1 /* trailing zero */)
8626 memset (§ions
, 0, sizeof (sections
));
8627 cleanups
= make_cleanup (null_cleanup
, 0);
8629 for (i
= 0; i
< MAX_NR_DWO_SECTIONS
; ++i
)
8632 uint32_t section_nr
=
8635 + (section_index
+ i
) * sizeof (uint32_t));
8637 if (section_nr
== 0)
8639 if (section_nr
>= dwp_file
->num_sections
)
8641 error (_("Dwarf Error: bad DWP hash table, section number too large"
8646 sectp
= dwp_file
->elf_sections
[section_nr
];
8647 if (! locate_virtual_dwo_sections (sectp
, §ions
))
8649 error (_("Dwarf Error: bad DWP hash table, invalid section found"
8656 || sections
.info_or_types
.asection
== NULL
8657 || sections
.abbrev
.asection
== NULL
)
8659 error (_("Dwarf Error: bad DWP hash table, missing DWO sections"
8663 if (i
== MAX_NR_DWO_SECTIONS
)
8665 error (_("Dwarf Error: bad DWP hash table, too many DWO sections"
8670 /* It's easier for the rest of the code if we fake a struct dwo_file and
8671 have dwo_unit "live" in that. At least for now.
8673 The DWP file can be made up of a random collection of CUs and TUs.
8674 However, for each CU + set of TUs that came from the same original DWO
8675 file, we want to combine them back into a virtual DWO file to save space
8676 (fewer struct dwo_file objects to allocated). Remember that for really
8677 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
8680 xstrprintf ("virtual-dwo/%d-%d-%d-%d",
8681 sections
.abbrev
.asection
? sections
.abbrev
.asection
->id
: 0,
8682 sections
.line
.asection
? sections
.line
.asection
->id
: 0,
8683 sections
.loc
.asection
? sections
.loc
.asection
->id
: 0,
8684 (sections
.str_offsets
.asection
8685 ? sections
.str_offsets
.asection
->id
8687 make_cleanup (xfree
, virtual_dwo_name
);
8688 /* Can we use an existing virtual DWO file? */
8689 dwo_file_slot
= lookup_dwo_file_slot (virtual_dwo_name
);
8690 /* Create one if necessary. */
8691 if (*dwo_file_slot
== NULL
)
8693 if (dwarf2_read_debug
)
8695 fprintf_unfiltered (gdb_stdlog
, "Creating virtual DWO: %s\n",
8698 dwo_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_file
);
8699 dwo_file
->name
= obstack_copy0 (&objfile
->objfile_obstack
,
8701 strlen (virtual_dwo_name
));
8702 dwo_file
->sections
.abbrev
= sections
.abbrev
;
8703 dwo_file
->sections
.line
= sections
.line
;
8704 dwo_file
->sections
.loc
= sections
.loc
;
8705 dwo_file
->sections
.macinfo
= sections
.macinfo
;
8706 dwo_file
->sections
.macro
= sections
.macro
;
8707 dwo_file
->sections
.str_offsets
= sections
.str_offsets
;
8708 /* The "str" section is global to the entire DWP file. */
8709 dwo_file
->sections
.str
= dwp_file
->sections
.str
;
8710 /* The info or types section is assigned later to dwo_unit,
8711 there's no need to record it in dwo_file.
8712 Also, we can't simply record type sections in dwo_file because
8713 we record a pointer into the vector in dwo_unit. As we collect more
8714 types we'll grow the vector and eventually have to reallocate space
8715 for it, invalidating all the pointers into the current copy. */
8716 *dwo_file_slot
= dwo_file
;
8720 if (dwarf2_read_debug
)
8722 fprintf_unfiltered (gdb_stdlog
, "Using existing virtual DWO: %s\n",
8725 dwo_file
= *dwo_file_slot
;
8727 do_cleanups (cleanups
);
8729 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
8730 dwo_unit
->dwo_file
= dwo_file
;
8731 dwo_unit
->signature
= signature
;
8732 dwo_unit
->info_or_types_section
=
8733 obstack_alloc (&objfile
->objfile_obstack
,
8734 sizeof (struct dwarf2_section_info
));
8735 *dwo_unit
->info_or_types_section
= sections
.info_or_types
;
8736 /* offset, length, type_offset_in_tu are set later. */
8741 /* Lookup the DWO with SIGNATURE in DWP_FILE. */
8743 static struct dwo_unit
*
8744 lookup_dwo_in_dwp (struct dwp_file
*dwp_file
,
8745 const struct dwp_hash_table
*htab
,
8746 ULONGEST signature
, int is_debug_types
)
8748 bfd
*dbfd
= dwp_file
->dbfd
;
8749 uint32_t mask
= htab
->nr_slots
- 1;
8750 uint32_t hash
= signature
& mask
;
8751 uint32_t hash2
= ((signature
>> 32) & mask
) | 1;
8754 struct dwo_unit find_dwo_cu
, *dwo_cu
;
8756 memset (&find_dwo_cu
, 0, sizeof (find_dwo_cu
));
8757 find_dwo_cu
.signature
= signature
;
8758 slot
= htab_find_slot (dwp_file
->loaded_cutus
, &find_dwo_cu
, INSERT
);
8763 /* Use a for loop so that we don't loop forever on bad debug info. */
8764 for (i
= 0; i
< htab
->nr_slots
; ++i
)
8766 ULONGEST signature_in_table
;
8768 signature_in_table
=
8769 read_8_bytes (dbfd
, htab
->hash_table
+ hash
* sizeof (uint64_t));
8770 if (signature_in_table
== signature
)
8772 uint32_t section_index
=
8773 read_4_bytes (dbfd
, htab
->unit_table
+ hash
* sizeof (uint32_t));
8775 *slot
= create_dwo_in_dwp (dwp_file
, htab
, section_index
,
8776 signature
, is_debug_types
);
8779 if (signature_in_table
== 0)
8781 hash
= (hash
+ hash2
) & mask
;
8784 error (_("Dwarf Error: bad DWP hash table, lookup didn't terminate"
8789 /* Subroutine of open_dwop_file to simplify it.
8790 Open the file specified by FILE_NAME and hand it off to BFD for
8791 preliminary analysis. Return a newly initialized bfd *, which
8792 includes a canonicalized copy of FILE_NAME.
8793 If IS_DWP is TRUE, we're opening a DWP file, otherwise a DWO file.
8794 In case of trouble, return NULL.
8795 NOTE: This function is derived from symfile_bfd_open. */
8798 try_open_dwop_file (const char *file_name
, int is_dwp
)
8802 char *absolute_name
;
8804 flags
= OPF_TRY_CWD_FIRST
;
8806 flags
|= OPF_SEARCH_IN_PATH
;
8807 desc
= openp (debug_file_directory
, flags
, file_name
,
8808 O_RDONLY
| O_BINARY
, &absolute_name
);
8812 sym_bfd
= gdb_bfd_open (absolute_name
, gnutarget
, desc
);
8815 xfree (absolute_name
);
8818 xfree (absolute_name
);
8819 bfd_set_cacheable (sym_bfd
, 1);
8821 if (!bfd_check_format (sym_bfd
, bfd_object
))
8823 gdb_bfd_unref (sym_bfd
); /* This also closes desc. */
8830 /* Try to open DWO/DWP file FILE_NAME.
8831 COMP_DIR is the DW_AT_comp_dir attribute.
8832 If IS_DWP is TRUE, we're opening a DWP file, otherwise a DWO file.
8833 The result is the bfd handle of the file.
8834 If there is a problem finding or opening the file, return NULL.
8835 Upon success, the canonicalized path of the file is stored in the bfd,
8836 same as symfile_bfd_open. */
8839 open_dwop_file (const char *file_name
, const char *comp_dir
, int is_dwp
)
8843 if (IS_ABSOLUTE_PATH (file_name
))
8844 return try_open_dwop_file (file_name
, is_dwp
);
8846 /* Before trying the search path, try DWO_NAME in COMP_DIR. */
8848 if (comp_dir
!= NULL
)
8850 char *path_to_try
= concat (comp_dir
, SLASH_STRING
, file_name
, NULL
);
8852 /* NOTE: If comp_dir is a relative path, this will also try the
8853 search path, which seems useful. */
8854 abfd
= try_open_dwop_file (path_to_try
, is_dwp
);
8855 xfree (path_to_try
);
8860 /* That didn't work, try debug-file-directory, which, despite its name,
8861 is a list of paths. */
8863 if (*debug_file_directory
== '\0')
8866 return try_open_dwop_file (file_name
, is_dwp
);
8869 /* This function is mapped across the sections and remembers the offset and
8870 size of each of the DWO debugging sections we are interested in. */
8873 dwarf2_locate_dwo_sections (bfd
*abfd
, asection
*sectp
, void *dwo_sections_ptr
)
8875 struct dwo_sections
*dwo_sections
= dwo_sections_ptr
;
8876 const struct dwop_section_names
*names
= &dwop_section_names
;
8878 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
8880 dwo_sections
->abbrev
.asection
= sectp
;
8881 dwo_sections
->abbrev
.size
= bfd_get_section_size (sectp
);
8883 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
8885 dwo_sections
->info
.asection
= sectp
;
8886 dwo_sections
->info
.size
= bfd_get_section_size (sectp
);
8888 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
8890 dwo_sections
->line
.asection
= sectp
;
8891 dwo_sections
->line
.size
= bfd_get_section_size (sectp
);
8893 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
8895 dwo_sections
->loc
.asection
= sectp
;
8896 dwo_sections
->loc
.size
= bfd_get_section_size (sectp
);
8898 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
8900 dwo_sections
->macinfo
.asection
= sectp
;
8901 dwo_sections
->macinfo
.size
= bfd_get_section_size (sectp
);
8903 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
8905 dwo_sections
->macro
.asection
= sectp
;
8906 dwo_sections
->macro
.size
= bfd_get_section_size (sectp
);
8908 else if (section_is_p (sectp
->name
, &names
->str_dwo
))
8910 dwo_sections
->str
.asection
= sectp
;
8911 dwo_sections
->str
.size
= bfd_get_section_size (sectp
);
8913 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
8915 dwo_sections
->str_offsets
.asection
= sectp
;
8916 dwo_sections
->str_offsets
.size
= bfd_get_section_size (sectp
);
8918 else if (section_is_p (sectp
->name
, &names
->types_dwo
))
8920 struct dwarf2_section_info type_section
;
8922 memset (&type_section
, 0, sizeof (type_section
));
8923 type_section
.asection
= sectp
;
8924 type_section
.size
= bfd_get_section_size (sectp
);
8925 VEC_safe_push (dwarf2_section_info_def
, dwo_sections
->types
,
8930 /* Initialize the use of the DWO file specified by DWO_NAME.
8931 The result is NULL if DWO_NAME can't be found. */
8933 static struct dwo_file
*
8934 open_and_init_dwo_file (const char *dwo_name
, const char *comp_dir
)
8936 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8937 struct dwo_file
*dwo_file
;
8939 struct cleanup
*cleanups
;
8941 dbfd
= open_dwop_file (dwo_name
, comp_dir
, 0);
8944 if (dwarf2_read_debug
)
8945 fprintf_unfiltered (gdb_stdlog
, "DWO file not found: %s\n", dwo_name
);
8948 dwo_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_file
);
8949 dwo_file
->name
= obstack_copy0 (&objfile
->objfile_obstack
,
8950 dwo_name
, strlen (dwo_name
));
8951 dwo_file
->dbfd
= dbfd
;
8953 cleanups
= make_cleanup (free_dwo_file_cleanup
, dwo_file
);
8955 bfd_map_over_sections (dbfd
, dwarf2_locate_dwo_sections
, &dwo_file
->sections
);
8957 dwo_file
->cus
= create_dwo_debug_info_hash_table (dwo_file
);
8959 dwo_file
->tus
= create_debug_types_hash_table (dwo_file
,
8960 dwo_file
->sections
.types
);
8962 discard_cleanups (cleanups
);
8964 if (dwarf2_read_debug
)
8965 fprintf_unfiltered (gdb_stdlog
, "DWO file found: %s\n", dwo_name
);
8970 /* This function is mapped across the sections and remembers the offset and
8971 size of each of the DWP debugging sections we are interested in. */
8974 dwarf2_locate_dwp_sections (bfd
*abfd
, asection
*sectp
, void *dwp_file_ptr
)
8976 struct dwp_file
*dwp_file
= dwp_file_ptr
;
8977 const struct dwop_section_names
*names
= &dwop_section_names
;
8978 unsigned int elf_section_nr
= elf_section_data (sectp
)->this_idx
;
8980 /* Record the ELF section number for later lookup: this is what the
8981 .debug_cu_index,.debug_tu_index tables use. */
8982 gdb_assert (elf_section_nr
< dwp_file
->num_sections
);
8983 dwp_file
->elf_sections
[elf_section_nr
] = sectp
;
8985 /* Look for specific sections that we need. */
8986 if (section_is_p (sectp
->name
, &names
->str_dwo
))
8988 dwp_file
->sections
.str
.asection
= sectp
;
8989 dwp_file
->sections
.str
.size
= bfd_get_section_size (sectp
);
8991 else if (section_is_p (sectp
->name
, &names
->cu_index
))
8993 dwp_file
->sections
.cu_index
.asection
= sectp
;
8994 dwp_file
->sections
.cu_index
.size
= bfd_get_section_size (sectp
);
8996 else if (section_is_p (sectp
->name
, &names
->tu_index
))
8998 dwp_file
->sections
.tu_index
.asection
= sectp
;
8999 dwp_file
->sections
.tu_index
.size
= bfd_get_section_size (sectp
);
9003 /* Hash function for dwp_file loaded CUs/TUs. */
9006 hash_dwp_loaded_cutus (const void *item
)
9008 const struct dwo_unit
*dwo_unit
= item
;
9010 /* This drops the top 32 bits of the signature, but is ok for a hash. */
9011 return dwo_unit
->signature
;
9014 /* Equality function for dwp_file loaded CUs/TUs. */
9017 eq_dwp_loaded_cutus (const void *a
, const void *b
)
9019 const struct dwo_unit
*dua
= a
;
9020 const struct dwo_unit
*dub
= b
;
9022 return dua
->signature
== dub
->signature
;
9025 /* Allocate a hash table for dwp_file loaded CUs/TUs. */
9028 allocate_dwp_loaded_cutus_table (struct objfile
*objfile
)
9030 return htab_create_alloc_ex (3,
9031 hash_dwp_loaded_cutus
,
9032 eq_dwp_loaded_cutus
,
9034 &objfile
->objfile_obstack
,
9035 hashtab_obstack_allocate
,
9036 dummy_obstack_deallocate
);
9039 /* Initialize the use of the DWP file for the current objfile.
9040 By convention the name of the DWP file is ${objfile}.dwp.
9041 The result is NULL if it can't be found. */
9043 static struct dwp_file
*
9044 open_and_init_dwp_file (const char *comp_dir
)
9046 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9047 struct dwp_file
*dwp_file
;
9050 struct cleanup
*cleanups
;
9052 dwp_name
= xstrprintf ("%s.dwp", dwarf2_per_objfile
->objfile
->name
);
9053 cleanups
= make_cleanup (xfree
, dwp_name
);
9055 dbfd
= open_dwop_file (dwp_name
, comp_dir
, 1);
9058 if (dwarf2_read_debug
)
9059 fprintf_unfiltered (gdb_stdlog
, "DWP file not found: %s\n", dwp_name
);
9060 do_cleanups (cleanups
);
9063 dwp_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwp_file
);
9064 dwp_file
->name
= obstack_copy0 (&objfile
->objfile_obstack
,
9065 dwp_name
, strlen (dwp_name
));
9066 dwp_file
->dbfd
= dbfd
;
9067 do_cleanups (cleanups
);
9069 cleanups
= make_cleanup (free_dwo_file_cleanup
, dwp_file
);
9071 /* +1: section 0 is unused */
9072 dwp_file
->num_sections
= bfd_count_sections (dbfd
) + 1;
9073 dwp_file
->elf_sections
=
9074 OBSTACK_CALLOC (&objfile
->objfile_obstack
,
9075 dwp_file
->num_sections
, asection
*);
9077 bfd_map_over_sections (dbfd
, dwarf2_locate_dwp_sections
, dwp_file
);
9079 dwp_file
->cus
= create_dwp_hash_table (dwp_file
, 0);
9081 dwp_file
->tus
= create_dwp_hash_table (dwp_file
, 1);
9083 dwp_file
->loaded_cutus
= allocate_dwp_loaded_cutus_table (objfile
);
9085 discard_cleanups (cleanups
);
9087 if (dwarf2_read_debug
)
9089 fprintf_unfiltered (gdb_stdlog
, "DWP file found: %s\n", dwp_file
->name
);
9090 fprintf_unfiltered (gdb_stdlog
,
9091 " %u CUs, %u TUs\n",
9092 dwp_file
->cus
? dwp_file
->cus
->nr_units
: 0,
9093 dwp_file
->tus
? dwp_file
->tus
->nr_units
: 0);
9099 /* Subroutine of lookup_dwo_comp_unit, lookup_dwo_type_unit.
9100 Look up the CU/TU with signature SIGNATURE, either in DWO file DWO_NAME
9101 or in the DWP file for the objfile, referenced by THIS_UNIT.
9102 If non-NULL, comp_dir is the DW_AT_comp_dir attribute.
9103 IS_DEBUG_TYPES is non-zero if reading a TU, otherwise read a CU.
9105 This is called, for example, when wanting to read a variable with a
9106 complex location. Therefore we don't want to do file i/o for every call.
9107 Therefore we don't want to look for a DWO file on every call.
9108 Therefore we first see if we've already seen SIGNATURE in a DWP file,
9109 then we check if we've already seen DWO_NAME, and only THEN do we check
9112 The result is a pointer to the dwo_unit object or NULL if we didn't find it
9113 (dwo_id mismatch or couldn't find the DWO/DWP file). */
9115 static struct dwo_unit
*
9116 lookup_dwo_cutu (struct dwarf2_per_cu_data
*this_unit
,
9117 const char *dwo_name
, const char *comp_dir
,
9118 ULONGEST signature
, int is_debug_types
)
9120 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9121 const char *kind
= is_debug_types
? "TU" : "CU";
9122 void **dwo_file_slot
;
9123 struct dwo_file
*dwo_file
;
9124 struct dwp_file
*dwp_file
;
9126 /* Have we already read SIGNATURE from a DWP file? */
9128 if (! dwarf2_per_objfile
->dwp_checked
)
9130 dwarf2_per_objfile
->dwp_file
= open_and_init_dwp_file (comp_dir
);
9131 dwarf2_per_objfile
->dwp_checked
= 1;
9133 dwp_file
= dwarf2_per_objfile
->dwp_file
;
9135 if (dwp_file
!= NULL
)
9137 const struct dwp_hash_table
*dwp_htab
=
9138 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
9140 if (dwp_htab
!= NULL
)
9142 struct dwo_unit
*dwo_cutu
=
9143 lookup_dwo_in_dwp (dwp_file
, dwp_htab
, signature
, is_debug_types
);
9145 if (dwo_cutu
!= NULL
)
9147 if (dwarf2_read_debug
)
9149 fprintf_unfiltered (gdb_stdlog
,
9150 "Virtual DWO %s %s found: @%s\n",
9151 kind
, hex_string (signature
),
9152 host_address_to_string (dwo_cutu
));
9159 /* Have we already seen DWO_NAME? */
9161 dwo_file_slot
= lookup_dwo_file_slot (dwo_name
);
9162 if (*dwo_file_slot
== NULL
)
9164 /* Read in the file and build a table of the DWOs it contains. */
9165 *dwo_file_slot
= open_and_init_dwo_file (dwo_name
, comp_dir
);
9167 /* NOTE: This will be NULL if unable to open the file. */
9168 dwo_file
= *dwo_file_slot
;
9170 if (dwo_file
!= NULL
)
9172 htab_t htab
= is_debug_types
? dwo_file
->tus
: dwo_file
->cus
;
9176 struct dwo_unit find_dwo_cutu
, *dwo_cutu
;
9178 memset (&find_dwo_cutu
, 0, sizeof (find_dwo_cutu
));
9179 find_dwo_cutu
.signature
= signature
;
9180 dwo_cutu
= htab_find (htab
, &find_dwo_cutu
);
9182 if (dwo_cutu
!= NULL
)
9184 if (dwarf2_read_debug
)
9186 fprintf_unfiltered (gdb_stdlog
, "DWO %s %s(%s) found: @%s\n",
9187 kind
, dwo_name
, hex_string (signature
),
9188 host_address_to_string (dwo_cutu
));
9195 /* We didn't find it. This could mean a dwo_id mismatch, or
9196 someone deleted the DWO/DWP file, or the search path isn't set up
9197 correctly to find the file. */
9199 if (dwarf2_read_debug
)
9201 fprintf_unfiltered (gdb_stdlog
, "DWO %s %s(%s) not found\n",
9202 kind
, dwo_name
, hex_string (signature
));
9205 complaint (&symfile_complaints
,
9206 _("Could not find DWO CU referenced by CU at offset 0x%x"
9208 this_unit
->offset
.sect_off
, objfile
->name
);
9212 /* Lookup the DWO CU DWO_NAME/SIGNATURE referenced from THIS_CU.
9213 See lookup_dwo_cutu_unit for details. */
9215 static struct dwo_unit
*
9216 lookup_dwo_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
9217 const char *dwo_name
, const char *comp_dir
,
9220 return lookup_dwo_cutu (this_cu
, dwo_name
, comp_dir
, signature
, 0);
9223 /* Lookup the DWO TU DWO_NAME/SIGNATURE referenced from THIS_TU.
9224 See lookup_dwo_cutu_unit for details. */
9226 static struct dwo_unit
*
9227 lookup_dwo_type_unit (struct signatured_type
*this_tu
,
9228 const char *dwo_name
, const char *comp_dir
)
9230 return lookup_dwo_cutu (&this_tu
->per_cu
, dwo_name
, comp_dir
, this_tu
->signature
, 1);
9233 /* Free all resources associated with DWO_FILE.
9234 Close the DWO file and munmap the sections.
9235 All memory should be on the objfile obstack. */
9238 free_dwo_file (struct dwo_file
*dwo_file
, struct objfile
*objfile
)
9241 struct dwarf2_section_info
*section
;
9243 gdb_bfd_unref (dwo_file
->dbfd
);
9245 VEC_free (dwarf2_section_info_def
, dwo_file
->sections
.types
);
9248 /* Wrapper for free_dwo_file for use in cleanups. */
9251 free_dwo_file_cleanup (void *arg
)
9253 struct dwo_file
*dwo_file
= (struct dwo_file
*) arg
;
9254 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9256 free_dwo_file (dwo_file
, objfile
);
9259 /* Traversal function for free_dwo_files. */
9262 free_dwo_file_from_slot (void **slot
, void *info
)
9264 struct dwo_file
*dwo_file
= (struct dwo_file
*) *slot
;
9265 struct objfile
*objfile
= (struct objfile
*) info
;
9267 free_dwo_file (dwo_file
, objfile
);
9272 /* Free all resources associated with DWO_FILES. */
9275 free_dwo_files (htab_t dwo_files
, struct objfile
*objfile
)
9277 htab_traverse_noresize (dwo_files
, free_dwo_file_from_slot
, objfile
);
9280 /* Read in various DIEs. */
9282 /* qsort helper for inherit_abstract_dies. */
9285 unsigned_int_compar (const void *ap
, const void *bp
)
9287 unsigned int a
= *(unsigned int *) ap
;
9288 unsigned int b
= *(unsigned int *) bp
;
9290 return (a
> b
) - (b
> a
);
9293 /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes).
9294 Inherit only the children of the DW_AT_abstract_origin DIE not being
9295 already referenced by DW_AT_abstract_origin from the children of the
9299 inherit_abstract_dies (struct die_info
*die
, struct dwarf2_cu
*cu
)
9301 struct die_info
*child_die
;
9302 unsigned die_children_count
;
9303 /* CU offsets which were referenced by children of the current DIE. */
9304 sect_offset
*offsets
;
9305 sect_offset
*offsets_end
, *offsetp
;
9306 /* Parent of DIE - referenced by DW_AT_abstract_origin. */
9307 struct die_info
*origin_die
;
9308 /* Iterator of the ORIGIN_DIE children. */
9309 struct die_info
*origin_child_die
;
9310 struct cleanup
*cleanups
;
9311 struct attribute
*attr
;
9312 struct dwarf2_cu
*origin_cu
;
9313 struct pending
**origin_previous_list_in_scope
;
9315 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
9319 /* Note that following die references may follow to a die in a
9323 origin_die
= follow_die_ref (die
, attr
, &origin_cu
);
9325 /* We're inheriting ORIGIN's children into the scope we'd put DIE's
9327 origin_previous_list_in_scope
= origin_cu
->list_in_scope
;
9328 origin_cu
->list_in_scope
= cu
->list_in_scope
;
9330 if (die
->tag
!= origin_die
->tag
9331 && !(die
->tag
== DW_TAG_inlined_subroutine
9332 && origin_die
->tag
== DW_TAG_subprogram
))
9333 complaint (&symfile_complaints
,
9334 _("DIE 0x%x and its abstract origin 0x%x have different tags"),
9335 die
->offset
.sect_off
, origin_die
->offset
.sect_off
);
9337 child_die
= die
->child
;
9338 die_children_count
= 0;
9339 while (child_die
&& child_die
->tag
)
9341 child_die
= sibling_die (child_die
);
9342 die_children_count
++;
9344 offsets
= xmalloc (sizeof (*offsets
) * die_children_count
);
9345 cleanups
= make_cleanup (xfree
, offsets
);
9347 offsets_end
= offsets
;
9348 child_die
= die
->child
;
9349 while (child_die
&& child_die
->tag
)
9351 /* For each CHILD_DIE, find the corresponding child of
9352 ORIGIN_DIE. If there is more than one layer of
9353 DW_AT_abstract_origin, follow them all; there shouldn't be,
9354 but GCC versions at least through 4.4 generate this (GCC PR
9356 struct die_info
*child_origin_die
= child_die
;
9357 struct dwarf2_cu
*child_origin_cu
= cu
;
9361 attr
= dwarf2_attr (child_origin_die
, DW_AT_abstract_origin
,
9365 child_origin_die
= follow_die_ref (child_origin_die
, attr
,
9369 /* According to DWARF3 3.3.8.2 #3 new entries without their abstract
9370 counterpart may exist. */
9371 if (child_origin_die
!= child_die
)
9373 if (child_die
->tag
!= child_origin_die
->tag
9374 && !(child_die
->tag
== DW_TAG_inlined_subroutine
9375 && child_origin_die
->tag
== DW_TAG_subprogram
))
9376 complaint (&symfile_complaints
,
9377 _("Child DIE 0x%x and its abstract origin 0x%x have "
9378 "different tags"), child_die
->offset
.sect_off
,
9379 child_origin_die
->offset
.sect_off
);
9380 if (child_origin_die
->parent
!= origin_die
)
9381 complaint (&symfile_complaints
,
9382 _("Child DIE 0x%x and its abstract origin 0x%x have "
9383 "different parents"), child_die
->offset
.sect_off
,
9384 child_origin_die
->offset
.sect_off
);
9386 *offsets_end
++ = child_origin_die
->offset
;
9388 child_die
= sibling_die (child_die
);
9390 qsort (offsets
, offsets_end
- offsets
, sizeof (*offsets
),
9391 unsigned_int_compar
);
9392 for (offsetp
= offsets
+ 1; offsetp
< offsets_end
; offsetp
++)
9393 if (offsetp
[-1].sect_off
== offsetp
->sect_off
)
9394 complaint (&symfile_complaints
,
9395 _("Multiple children of DIE 0x%x refer "
9396 "to DIE 0x%x as their abstract origin"),
9397 die
->offset
.sect_off
, offsetp
->sect_off
);
9400 origin_child_die
= origin_die
->child
;
9401 while (origin_child_die
&& origin_child_die
->tag
)
9403 /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */
9404 while (offsetp
< offsets_end
9405 && offsetp
->sect_off
< origin_child_die
->offset
.sect_off
)
9407 if (offsetp
>= offsets_end
9408 || offsetp
->sect_off
> origin_child_die
->offset
.sect_off
)
9410 /* Found that ORIGIN_CHILD_DIE is really not referenced. */
9411 process_die (origin_child_die
, origin_cu
);
9413 origin_child_die
= sibling_die (origin_child_die
);
9415 origin_cu
->list_in_scope
= origin_previous_list_in_scope
;
9417 do_cleanups (cleanups
);
9421 read_func_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
9423 struct objfile
*objfile
= cu
->objfile
;
9424 struct context_stack
*new;
9427 struct die_info
*child_die
;
9428 struct attribute
*attr
, *call_line
, *call_file
;
9431 struct block
*block
;
9432 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
9433 VEC (symbolp
) *template_args
= NULL
;
9434 struct template_symbol
*templ_func
= NULL
;
9438 /* If we do not have call site information, we can't show the
9439 caller of this inlined function. That's too confusing, so
9440 only use the scope for local variables. */
9441 call_line
= dwarf2_attr (die
, DW_AT_call_line
, cu
);
9442 call_file
= dwarf2_attr (die
, DW_AT_call_file
, cu
);
9443 if (call_line
== NULL
|| call_file
== NULL
)
9445 read_lexical_block_scope (die
, cu
);
9450 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
9452 name
= dwarf2_name (die
, cu
);
9454 /* Ignore functions with missing or empty names. These are actually
9455 illegal according to the DWARF standard. */
9458 complaint (&symfile_complaints
,
9459 _("missing name for subprogram DIE at %d"),
9460 die
->offset
.sect_off
);
9464 /* Ignore functions with missing or invalid low and high pc attributes. */
9465 if (!dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
9467 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
9468 if (!attr
|| !DW_UNSND (attr
))
9469 complaint (&symfile_complaints
,
9470 _("cannot get low and high bounds "
9471 "for subprogram DIE at %d"),
9472 die
->offset
.sect_off
);
9479 /* If we have any template arguments, then we must allocate a
9480 different sort of symbol. */
9481 for (child_die
= die
->child
; child_die
; child_die
= sibling_die (child_die
))
9483 if (child_die
->tag
== DW_TAG_template_type_param
9484 || child_die
->tag
== DW_TAG_template_value_param
)
9486 templ_func
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
9487 struct template_symbol
);
9488 templ_func
->base
.is_cplus_template_function
= 1;
9493 new = push_context (0, lowpc
);
9494 new->name
= new_symbol_full (die
, read_type_die (die
, cu
), cu
,
9495 (struct symbol
*) templ_func
);
9497 /* If there is a location expression for DW_AT_frame_base, record
9499 attr
= dwarf2_attr (die
, DW_AT_frame_base
, cu
);
9501 /* FIXME: cagney/2004-01-26: The DW_AT_frame_base's location
9502 expression is being recorded directly in the function's symbol
9503 and not in a separate frame-base object. I guess this hack is
9504 to avoid adding some sort of frame-base adjunct/annex to the
9505 function's symbol :-(. The problem with doing this is that it
9506 results in a function symbol with a location expression that
9507 has nothing to do with the location of the function, ouch! The
9508 relationship should be: a function's symbol has-a frame base; a
9509 frame-base has-a location expression. */
9510 dwarf2_symbol_mark_computed (attr
, new->name
, cu
);
9512 cu
->list_in_scope
= &local_symbols
;
9514 if (die
->child
!= NULL
)
9516 child_die
= die
->child
;
9517 while (child_die
&& child_die
->tag
)
9519 if (child_die
->tag
== DW_TAG_template_type_param
9520 || child_die
->tag
== DW_TAG_template_value_param
)
9522 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
9525 VEC_safe_push (symbolp
, template_args
, arg
);
9528 process_die (child_die
, cu
);
9529 child_die
= sibling_die (child_die
);
9533 inherit_abstract_dies (die
, cu
);
9535 /* If we have a DW_AT_specification, we might need to import using
9536 directives from the context of the specification DIE. See the
9537 comment in determine_prefix. */
9538 if (cu
->language
== language_cplus
9539 && dwarf2_attr (die
, DW_AT_specification
, cu
))
9541 struct dwarf2_cu
*spec_cu
= cu
;
9542 struct die_info
*spec_die
= die_specification (die
, &spec_cu
);
9546 child_die
= spec_die
->child
;
9547 while (child_die
&& child_die
->tag
)
9549 if (child_die
->tag
== DW_TAG_imported_module
)
9550 process_die (child_die
, spec_cu
);
9551 child_die
= sibling_die (child_die
);
9554 /* In some cases, GCC generates specification DIEs that
9555 themselves contain DW_AT_specification attributes. */
9556 spec_die
= die_specification (spec_die
, &spec_cu
);
9560 new = pop_context ();
9561 /* Make a block for the local symbols within. */
9562 block
= finish_block (new->name
, &local_symbols
, new->old_blocks
,
9563 lowpc
, highpc
, objfile
);
9565 /* For C++, set the block's scope. */
9566 if ((cu
->language
== language_cplus
|| cu
->language
== language_fortran
)
9567 && cu
->processing_has_namespace_info
)
9568 block_set_scope (block
, determine_prefix (die
, cu
),
9569 &objfile
->objfile_obstack
);
9571 /* If we have address ranges, record them. */
9572 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
9574 /* Attach template arguments to function. */
9575 if (! VEC_empty (symbolp
, template_args
))
9577 gdb_assert (templ_func
!= NULL
);
9579 templ_func
->n_template_arguments
= VEC_length (symbolp
, template_args
);
9580 templ_func
->template_arguments
9581 = obstack_alloc (&objfile
->objfile_obstack
,
9582 (templ_func
->n_template_arguments
9583 * sizeof (struct symbol
*)));
9584 memcpy (templ_func
->template_arguments
,
9585 VEC_address (symbolp
, template_args
),
9586 (templ_func
->n_template_arguments
* sizeof (struct symbol
*)));
9587 VEC_free (symbolp
, template_args
);
9590 /* In C++, we can have functions nested inside functions (e.g., when
9591 a function declares a class that has methods). This means that
9592 when we finish processing a function scope, we may need to go
9593 back to building a containing block's symbol lists. */
9594 local_symbols
= new->locals
;
9595 using_directives
= new->using_directives
;
9597 /* If we've finished processing a top-level function, subsequent
9598 symbols go in the file symbol list. */
9599 if (outermost_context_p ())
9600 cu
->list_in_scope
= &file_symbols
;
9603 /* Process all the DIES contained within a lexical block scope. Start
9604 a new scope, process the dies, and then close the scope. */
9607 read_lexical_block_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
9609 struct objfile
*objfile
= cu
->objfile
;
9610 struct context_stack
*new;
9611 CORE_ADDR lowpc
, highpc
;
9612 struct die_info
*child_die
;
9615 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
9617 /* Ignore blocks with missing or invalid low and high pc attributes. */
9618 /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges
9619 as multiple lexical blocks? Handling children in a sane way would
9620 be nasty. Might be easier to properly extend generic blocks to
9622 if (!dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
9627 push_context (0, lowpc
);
9628 if (die
->child
!= NULL
)
9630 child_die
= die
->child
;
9631 while (child_die
&& child_die
->tag
)
9633 process_die (child_die
, cu
);
9634 child_die
= sibling_die (child_die
);
9637 new = pop_context ();
9639 if (local_symbols
!= NULL
|| using_directives
!= NULL
)
9642 = finish_block (0, &local_symbols
, new->old_blocks
, new->start_addr
,
9645 /* Note that recording ranges after traversing children, as we
9646 do here, means that recording a parent's ranges entails
9647 walking across all its children's ranges as they appear in
9648 the address map, which is quadratic behavior.
9650 It would be nicer to record the parent's ranges before
9651 traversing its children, simply overriding whatever you find
9652 there. But since we don't even decide whether to create a
9653 block until after we've traversed its children, that's hard
9655 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
9657 local_symbols
= new->locals
;
9658 using_directives
= new->using_directives
;
9661 /* Read in DW_TAG_GNU_call_site and insert it to CU->call_site_htab. */
9664 read_call_site_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
9666 struct objfile
*objfile
= cu
->objfile
;
9667 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
9668 CORE_ADDR pc
, baseaddr
;
9669 struct attribute
*attr
;
9670 struct call_site
*call_site
, call_site_local
;
9673 struct die_info
*child_die
;
9675 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
9677 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
9680 complaint (&symfile_complaints
,
9681 _("missing DW_AT_low_pc for DW_TAG_GNU_call_site "
9682 "DIE 0x%x [in module %s]"),
9683 die
->offset
.sect_off
, objfile
->name
);
9686 pc
= DW_ADDR (attr
) + baseaddr
;
9688 if (cu
->call_site_htab
== NULL
)
9689 cu
->call_site_htab
= htab_create_alloc_ex (16, core_addr_hash
, core_addr_eq
,
9690 NULL
, &objfile
->objfile_obstack
,
9691 hashtab_obstack_allocate
, NULL
);
9692 call_site_local
.pc
= pc
;
9693 slot
= htab_find_slot (cu
->call_site_htab
, &call_site_local
, INSERT
);
9696 complaint (&symfile_complaints
,
9697 _("Duplicate PC %s for DW_TAG_GNU_call_site "
9698 "DIE 0x%x [in module %s]"),
9699 paddress (gdbarch
, pc
), die
->offset
.sect_off
, objfile
->name
);
9703 /* Count parameters at the caller. */
9706 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
9707 child_die
= sibling_die (child_die
))
9709 if (child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
9711 complaint (&symfile_complaints
,
9712 _("Tag %d is not DW_TAG_GNU_call_site_parameter in "
9713 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
9714 child_die
->tag
, child_die
->offset
.sect_off
, objfile
->name
);
9721 call_site
= obstack_alloc (&objfile
->objfile_obstack
,
9722 (sizeof (*call_site
)
9723 + (sizeof (*call_site
->parameter
)
9726 memset (call_site
, 0, sizeof (*call_site
) - sizeof (*call_site
->parameter
));
9729 if (dwarf2_flag_true_p (die
, DW_AT_GNU_tail_call
, cu
))
9731 struct die_info
*func_die
;
9733 /* Skip also over DW_TAG_inlined_subroutine. */
9734 for (func_die
= die
->parent
;
9735 func_die
&& func_die
->tag
!= DW_TAG_subprogram
9736 && func_die
->tag
!= DW_TAG_subroutine_type
;
9737 func_die
= func_die
->parent
);
9739 /* DW_AT_GNU_all_call_sites is a superset
9740 of DW_AT_GNU_all_tail_call_sites. */
9742 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_call_sites
, cu
)
9743 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_tail_call_sites
, cu
))
9745 /* TYPE_TAIL_CALL_LIST is not interesting in functions where it is
9746 not complete. But keep CALL_SITE for look ups via call_site_htab,
9747 both the initial caller containing the real return address PC and
9748 the final callee containing the current PC of a chain of tail
9749 calls do not need to have the tail call list complete. But any
9750 function candidate for a virtual tail call frame searched via
9751 TYPE_TAIL_CALL_LIST must have the tail call list complete to be
9752 determined unambiguously. */
9756 struct type
*func_type
= NULL
;
9759 func_type
= get_die_type (func_die
, cu
);
9760 if (func_type
!= NULL
)
9762 gdb_assert (TYPE_CODE (func_type
) == TYPE_CODE_FUNC
);
9764 /* Enlist this call site to the function. */
9765 call_site
->tail_call_next
= TYPE_TAIL_CALL_LIST (func_type
);
9766 TYPE_TAIL_CALL_LIST (func_type
) = call_site
;
9769 complaint (&symfile_complaints
,
9770 _("Cannot find function owning DW_TAG_GNU_call_site "
9771 "DIE 0x%x [in module %s]"),
9772 die
->offset
.sect_off
, objfile
->name
);
9776 attr
= dwarf2_attr (die
, DW_AT_GNU_call_site_target
, cu
);
9778 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
9779 SET_FIELD_DWARF_BLOCK (call_site
->target
, NULL
);
9780 if (!attr
|| (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0))
9781 /* Keep NULL DWARF_BLOCK. */;
9782 else if (attr_form_is_block (attr
))
9784 struct dwarf2_locexpr_baton
*dlbaton
;
9786 dlbaton
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (*dlbaton
));
9787 dlbaton
->data
= DW_BLOCK (attr
)->data
;
9788 dlbaton
->size
= DW_BLOCK (attr
)->size
;
9789 dlbaton
->per_cu
= cu
->per_cu
;
9791 SET_FIELD_DWARF_BLOCK (call_site
->target
, dlbaton
);
9793 else if (is_ref_attr (attr
))
9795 struct dwarf2_cu
*target_cu
= cu
;
9796 struct die_info
*target_die
;
9798 target_die
= follow_die_ref_or_sig (die
, attr
, &target_cu
);
9799 gdb_assert (target_cu
->objfile
== objfile
);
9800 if (die_is_declaration (target_die
, target_cu
))
9802 const char *target_physname
;
9804 target_physname
= dwarf2_physname (NULL
, target_die
, target_cu
);
9805 if (target_physname
== NULL
)
9806 complaint (&symfile_complaints
,
9807 _("DW_AT_GNU_call_site_target target DIE has invalid "
9808 "physname, for referencing DIE 0x%x [in module %s]"),
9809 die
->offset
.sect_off
, objfile
->name
);
9811 SET_FIELD_PHYSNAME (call_site
->target
, target_physname
);
9817 /* DW_AT_entry_pc should be preferred. */
9818 if (!dwarf2_get_pc_bounds (target_die
, &lowpc
, NULL
, target_cu
, NULL
))
9819 complaint (&symfile_complaints
,
9820 _("DW_AT_GNU_call_site_target target DIE has invalid "
9821 "low pc, for referencing DIE 0x%x [in module %s]"),
9822 die
->offset
.sect_off
, objfile
->name
);
9824 SET_FIELD_PHYSADDR (call_site
->target
, lowpc
+ baseaddr
);
9828 complaint (&symfile_complaints
,
9829 _("DW_TAG_GNU_call_site DW_AT_GNU_call_site_target is neither "
9830 "block nor reference, for DIE 0x%x [in module %s]"),
9831 die
->offset
.sect_off
, objfile
->name
);
9833 call_site
->per_cu
= cu
->per_cu
;
9835 for (child_die
= die
->child
;
9836 child_die
&& child_die
->tag
;
9837 child_die
= sibling_die (child_die
))
9839 struct call_site_parameter
*parameter
;
9840 struct attribute
*loc
, *origin
;
9842 if (child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
9844 /* Already printed the complaint above. */
9848 gdb_assert (call_site
->parameter_count
< nparams
);
9849 parameter
= &call_site
->parameter
[call_site
->parameter_count
];
9851 /* DW_AT_location specifies the register number or DW_AT_abstract_origin
9852 specifies DW_TAG_formal_parameter. Value of the data assumed for the
9853 register is contained in DW_AT_GNU_call_site_value. */
9855 loc
= dwarf2_attr (child_die
, DW_AT_location
, cu
);
9856 origin
= dwarf2_attr (child_die
, DW_AT_abstract_origin
, cu
);
9857 if (loc
== NULL
&& origin
!= NULL
&& is_ref_attr (origin
))
9861 parameter
->kind
= CALL_SITE_PARAMETER_PARAM_OFFSET
;
9862 offset
= dwarf2_get_ref_die_offset (origin
);
9863 if (!offset_in_cu_p (&cu
->header
, offset
))
9865 /* As DW_OP_GNU_parameter_ref uses CU-relative offset this
9866 binding can be done only inside one CU. Such referenced DIE
9867 therefore cannot be even moved to DW_TAG_partial_unit. */
9868 complaint (&symfile_complaints
,
9869 _("DW_AT_abstract_origin offset is not in CU for "
9870 "DW_TAG_GNU_call_site child DIE 0x%x "
9872 child_die
->offset
.sect_off
, objfile
->name
);
9875 parameter
->u
.param_offset
.cu_off
= (offset
.sect_off
9876 - cu
->header
.offset
.sect_off
);
9878 else if (loc
== NULL
|| origin
!= NULL
|| !attr_form_is_block (loc
))
9880 complaint (&symfile_complaints
,
9881 _("No DW_FORM_block* DW_AT_location for "
9882 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
9883 child_die
->offset
.sect_off
, objfile
->name
);
9888 parameter
->u
.dwarf_reg
= dwarf_block_to_dwarf_reg
9889 (DW_BLOCK (loc
)->data
, &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
]);
9890 if (parameter
->u
.dwarf_reg
!= -1)
9891 parameter
->kind
= CALL_SITE_PARAMETER_DWARF_REG
;
9892 else if (dwarf_block_to_sp_offset (gdbarch
, DW_BLOCK (loc
)->data
,
9893 &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
],
9894 ¶meter
->u
.fb_offset
))
9895 parameter
->kind
= CALL_SITE_PARAMETER_FB_OFFSET
;
9898 complaint (&symfile_complaints
,
9899 _("Only single DW_OP_reg or DW_OP_fbreg is supported "
9900 "for DW_FORM_block* DW_AT_location is supported for "
9901 "DW_TAG_GNU_call_site child DIE 0x%x "
9903 child_die
->offset
.sect_off
, objfile
->name
);
9908 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_value
, cu
);
9909 if (!attr_form_is_block (attr
))
9911 complaint (&symfile_complaints
,
9912 _("No DW_FORM_block* DW_AT_GNU_call_site_value for "
9913 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
9914 child_die
->offset
.sect_off
, objfile
->name
);
9917 parameter
->value
= DW_BLOCK (attr
)->data
;
9918 parameter
->value_size
= DW_BLOCK (attr
)->size
;
9920 /* Parameters are not pre-cleared by memset above. */
9921 parameter
->data_value
= NULL
;
9922 parameter
->data_value_size
= 0;
9923 call_site
->parameter_count
++;
9925 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_data_value
, cu
);
9928 if (!attr_form_is_block (attr
))
9929 complaint (&symfile_complaints
,
9930 _("No DW_FORM_block* DW_AT_GNU_call_site_data_value for "
9931 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
9932 child_die
->offset
.sect_off
, objfile
->name
);
9935 parameter
->data_value
= DW_BLOCK (attr
)->data
;
9936 parameter
->data_value_size
= DW_BLOCK (attr
)->size
;
9942 /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET.
9943 Return 1 if the attributes are present and valid, otherwise, return 0.
9944 If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */
9947 dwarf2_ranges_read (unsigned offset
, CORE_ADDR
*low_return
,
9948 CORE_ADDR
*high_return
, struct dwarf2_cu
*cu
,
9949 struct partial_symtab
*ranges_pst
)
9951 struct objfile
*objfile
= cu
->objfile
;
9952 struct comp_unit_head
*cu_header
= &cu
->header
;
9953 bfd
*obfd
= objfile
->obfd
;
9954 unsigned int addr_size
= cu_header
->addr_size
;
9955 CORE_ADDR mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
9956 /* Base address selection entry. */
9967 found_base
= cu
->base_known
;
9968 base
= cu
->base_address
;
9970 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->ranges
);
9971 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
9973 complaint (&symfile_complaints
,
9974 _("Offset %d out of bounds for DW_AT_ranges attribute"),
9978 buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
9980 /* Read in the largest possible address. */
9981 marker
= read_address (obfd
, buffer
, cu
, &dummy
);
9982 if ((marker
& mask
) == mask
)
9984 /* If we found the largest possible address, then
9985 read the base address. */
9986 base
= read_address (obfd
, buffer
+ addr_size
, cu
, &dummy
);
9987 buffer
+= 2 * addr_size
;
9988 offset
+= 2 * addr_size
;
9994 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
9998 CORE_ADDR range_beginning
, range_end
;
10000 range_beginning
= read_address (obfd
, buffer
, cu
, &dummy
);
10001 buffer
+= addr_size
;
10002 range_end
= read_address (obfd
, buffer
, cu
, &dummy
);
10003 buffer
+= addr_size
;
10004 offset
+= 2 * addr_size
;
10006 /* An end of list marker is a pair of zero addresses. */
10007 if (range_beginning
== 0 && range_end
== 0)
10008 /* Found the end of list entry. */
10011 /* Each base address selection entry is a pair of 2 values.
10012 The first is the largest possible address, the second is
10013 the base address. Check for a base address here. */
10014 if ((range_beginning
& mask
) == mask
)
10016 /* If we found the largest possible address, then
10017 read the base address. */
10018 base
= read_address (obfd
, buffer
+ addr_size
, cu
, &dummy
);
10025 /* We have no valid base address for the ranges
10027 complaint (&symfile_complaints
,
10028 _("Invalid .debug_ranges data (no base address)"));
10032 if (range_beginning
> range_end
)
10034 /* Inverted range entries are invalid. */
10035 complaint (&symfile_complaints
,
10036 _("Invalid .debug_ranges data (inverted range)"));
10040 /* Empty range entries have no effect. */
10041 if (range_beginning
== range_end
)
10044 range_beginning
+= base
;
10047 /* A not-uncommon case of bad debug info.
10048 Don't pollute the addrmap with bad data. */
10049 if (range_beginning
+ baseaddr
== 0
10050 && !dwarf2_per_objfile
->has_section_at_zero
)
10052 complaint (&symfile_complaints
,
10053 _(".debug_ranges entry has start address of zero"
10054 " [in module %s]"), objfile
->name
);
10058 if (ranges_pst
!= NULL
)
10059 addrmap_set_empty (objfile
->psymtabs_addrmap
,
10060 range_beginning
+ baseaddr
,
10061 range_end
- 1 + baseaddr
,
10064 /* FIXME: This is recording everything as a low-high
10065 segment of consecutive addresses. We should have a
10066 data structure for discontiguous block ranges
10070 low
= range_beginning
;
10076 if (range_beginning
< low
)
10077 low
= range_beginning
;
10078 if (range_end
> high
)
10084 /* If the first entry is an end-of-list marker, the range
10085 describes an empty scope, i.e. no instructions. */
10091 *high_return
= high
;
10095 /* Get low and high pc attributes from a die. Return 1 if the attributes
10096 are present and valid, otherwise, return 0. Return -1 if the range is
10097 discontinuous, i.e. derived from DW_AT_ranges information. */
10100 dwarf2_get_pc_bounds (struct die_info
*die
, CORE_ADDR
*lowpc
,
10101 CORE_ADDR
*highpc
, struct dwarf2_cu
*cu
,
10102 struct partial_symtab
*pst
)
10104 struct attribute
*attr
;
10105 struct attribute
*attr_high
;
10107 CORE_ADDR high
= 0;
10110 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
10113 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
10116 low
= DW_ADDR (attr
);
10117 if (attr_high
->form
== DW_FORM_addr
10118 || attr_high
->form
== DW_FORM_GNU_addr_index
)
10119 high
= DW_ADDR (attr_high
);
10121 high
= low
+ DW_UNSND (attr_high
);
10124 /* Found high w/o low attribute. */
10127 /* Found consecutive range of addresses. */
10132 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
10135 /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton.
10136 We take advantage of the fact that DW_AT_ranges does not appear
10137 in DW_TAG_compile_unit of DWO files. */
10138 int need_ranges_base
= die
->tag
!= DW_TAG_compile_unit
;
10139 unsigned int ranges_offset
= (DW_UNSND (attr
)
10140 + (need_ranges_base
10144 /* Value of the DW_AT_ranges attribute is the offset in the
10145 .debug_ranges section. */
10146 if (!dwarf2_ranges_read (ranges_offset
, &low
, &high
, cu
, pst
))
10148 /* Found discontinuous range of addresses. */
10153 /* read_partial_die has also the strict LOW < HIGH requirement. */
10157 /* When using the GNU linker, .gnu.linkonce. sections are used to
10158 eliminate duplicate copies of functions and vtables and such.
10159 The linker will arbitrarily choose one and discard the others.
10160 The AT_*_pc values for such functions refer to local labels in
10161 these sections. If the section from that file was discarded, the
10162 labels are not in the output, so the relocs get a value of 0.
10163 If this is a discarded function, mark the pc bounds as invalid,
10164 so that GDB will ignore it. */
10165 if (low
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
10174 /* Assuming that DIE represents a subprogram DIE or a lexical block, get
10175 its low and high PC addresses. Do nothing if these addresses could not
10176 be determined. Otherwise, set LOWPC to the low address if it is smaller,
10177 and HIGHPC to the high address if greater than HIGHPC. */
10180 dwarf2_get_subprogram_pc_bounds (struct die_info
*die
,
10181 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
10182 struct dwarf2_cu
*cu
)
10184 CORE_ADDR low
, high
;
10185 struct die_info
*child
= die
->child
;
10187 if (dwarf2_get_pc_bounds (die
, &low
, &high
, cu
, NULL
))
10189 *lowpc
= min (*lowpc
, low
);
10190 *highpc
= max (*highpc
, high
);
10193 /* If the language does not allow nested subprograms (either inside
10194 subprograms or lexical blocks), we're done. */
10195 if (cu
->language
!= language_ada
)
10198 /* Check all the children of the given DIE. If it contains nested
10199 subprograms, then check their pc bounds. Likewise, we need to
10200 check lexical blocks as well, as they may also contain subprogram
10202 while (child
&& child
->tag
)
10204 if (child
->tag
== DW_TAG_subprogram
10205 || child
->tag
== DW_TAG_lexical_block
)
10206 dwarf2_get_subprogram_pc_bounds (child
, lowpc
, highpc
, cu
);
10207 child
= sibling_die (child
);
10211 /* Get the low and high pc's represented by the scope DIE, and store
10212 them in *LOWPC and *HIGHPC. If the correct values can't be
10213 determined, set *LOWPC to -1 and *HIGHPC to 0. */
10216 get_scope_pc_bounds (struct die_info
*die
,
10217 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
10218 struct dwarf2_cu
*cu
)
10220 CORE_ADDR best_low
= (CORE_ADDR
) -1;
10221 CORE_ADDR best_high
= (CORE_ADDR
) 0;
10222 CORE_ADDR current_low
, current_high
;
10224 if (dwarf2_get_pc_bounds (die
, ¤t_low
, ¤t_high
, cu
, NULL
))
10226 best_low
= current_low
;
10227 best_high
= current_high
;
10231 struct die_info
*child
= die
->child
;
10233 while (child
&& child
->tag
)
10235 switch (child
->tag
) {
10236 case DW_TAG_subprogram
:
10237 dwarf2_get_subprogram_pc_bounds (child
, &best_low
, &best_high
, cu
);
10239 case DW_TAG_namespace
:
10240 case DW_TAG_module
:
10241 /* FIXME: carlton/2004-01-16: Should we do this for
10242 DW_TAG_class_type/DW_TAG_structure_type, too? I think
10243 that current GCC's always emit the DIEs corresponding
10244 to definitions of methods of classes as children of a
10245 DW_TAG_compile_unit or DW_TAG_namespace (as opposed to
10246 the DIEs giving the declarations, which could be
10247 anywhere). But I don't see any reason why the
10248 standards says that they have to be there. */
10249 get_scope_pc_bounds (child
, ¤t_low
, ¤t_high
, cu
);
10251 if (current_low
!= ((CORE_ADDR
) -1))
10253 best_low
= min (best_low
, current_low
);
10254 best_high
= max (best_high
, current_high
);
10262 child
= sibling_die (child
);
10267 *highpc
= best_high
;
10270 /* Record the address ranges for BLOCK, offset by BASEADDR, as given
10274 dwarf2_record_block_ranges (struct die_info
*die
, struct block
*block
,
10275 CORE_ADDR baseaddr
, struct dwarf2_cu
*cu
)
10277 struct objfile
*objfile
= cu
->objfile
;
10278 struct attribute
*attr
;
10279 struct attribute
*attr_high
;
10281 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
10284 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
10287 CORE_ADDR low
= DW_ADDR (attr
);
10289 if (attr_high
->form
== DW_FORM_addr
10290 || attr_high
->form
== DW_FORM_GNU_addr_index
)
10291 high
= DW_ADDR (attr_high
);
10293 high
= low
+ DW_UNSND (attr_high
);
10295 record_block_range (block
, baseaddr
+ low
, baseaddr
+ high
- 1);
10299 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
10302 bfd
*obfd
= objfile
->obfd
;
10303 /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton.
10304 We take advantage of the fact that DW_AT_ranges does not appear
10305 in DW_TAG_compile_unit of DWO files. */
10306 int need_ranges_base
= die
->tag
!= DW_TAG_compile_unit
;
10308 /* The value of the DW_AT_ranges attribute is the offset of the
10309 address range list in the .debug_ranges section. */
10310 unsigned long offset
= (DW_UNSND (attr
)
10311 + (need_ranges_base
? cu
->ranges_base
: 0));
10312 gdb_byte
*buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
10314 /* For some target architectures, but not others, the
10315 read_address function sign-extends the addresses it returns.
10316 To recognize base address selection entries, we need a
10318 unsigned int addr_size
= cu
->header
.addr_size
;
10319 CORE_ADDR base_select_mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
10321 /* The base address, to which the next pair is relative. Note
10322 that this 'base' is a DWARF concept: most entries in a range
10323 list are relative, to reduce the number of relocs against the
10324 debugging information. This is separate from this function's
10325 'baseaddr' argument, which GDB uses to relocate debugging
10326 information from a shared library based on the address at
10327 which the library was loaded. */
10328 CORE_ADDR base
= cu
->base_address
;
10329 int base_known
= cu
->base_known
;
10331 gdb_assert (dwarf2_per_objfile
->ranges
.readin
);
10332 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
10334 complaint (&symfile_complaints
,
10335 _("Offset %lu out of bounds for DW_AT_ranges attribute"),
10342 unsigned int bytes_read
;
10343 CORE_ADDR start
, end
;
10345 start
= read_address (obfd
, buffer
, cu
, &bytes_read
);
10346 buffer
+= bytes_read
;
10347 end
= read_address (obfd
, buffer
, cu
, &bytes_read
);
10348 buffer
+= bytes_read
;
10350 /* Did we find the end of the range list? */
10351 if (start
== 0 && end
== 0)
10354 /* Did we find a base address selection entry? */
10355 else if ((start
& base_select_mask
) == base_select_mask
)
10361 /* We found an ordinary address range. */
10366 complaint (&symfile_complaints
,
10367 _("Invalid .debug_ranges data "
10368 "(no base address)"));
10374 /* Inverted range entries are invalid. */
10375 complaint (&symfile_complaints
,
10376 _("Invalid .debug_ranges data "
10377 "(inverted range)"));
10381 /* Empty range entries have no effect. */
10385 start
+= base
+ baseaddr
;
10386 end
+= base
+ baseaddr
;
10388 /* A not-uncommon case of bad debug info.
10389 Don't pollute the addrmap with bad data. */
10390 if (start
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
10392 complaint (&symfile_complaints
,
10393 _(".debug_ranges entry has start address of zero"
10394 " [in module %s]"), objfile
->name
);
10398 record_block_range (block
, start
, end
- 1);
10404 /* Check whether the producer field indicates either of GCC < 4.6, or the
10405 Intel C/C++ compiler, and cache the result in CU. */
10408 check_producer (struct dwarf2_cu
*cu
)
10411 int major
, minor
, release
;
10413 if (cu
->producer
== NULL
)
10415 /* For unknown compilers expect their behavior is DWARF version
10418 GCC started to support .debug_types sections by -gdwarf-4 since
10419 gcc-4.5.x. As the .debug_types sections are missing DW_AT_producer
10420 for their space efficiency GDB cannot workaround gcc-4.5.x -gdwarf-4
10421 combination. gcc-4.5.x -gdwarf-4 binaries have DW_AT_accessibility
10422 interpreted incorrectly by GDB now - GCC PR debug/48229. */
10424 else if (strncmp (cu
->producer
, "GNU ", strlen ("GNU ")) == 0)
10426 /* Skip any identifier after "GNU " - such as "C++" or "Java". */
10428 cs
= &cu
->producer
[strlen ("GNU ")];
10429 while (*cs
&& !isdigit (*cs
))
10431 if (sscanf (cs
, "%d.%d.%d", &major
, &minor
, &release
) != 3)
10433 /* Not recognized as GCC. */
10437 cu
->producer_is_gxx_lt_4_6
= major
< 4 || (major
== 4 && minor
< 6);
10438 cu
->producer_is_gcc_lt_4_3
= major
< 4 || (major
== 4 && minor
< 3);
10441 else if (strncmp (cu
->producer
, "Intel(R) C", strlen ("Intel(R) C")) == 0)
10442 cu
->producer_is_icc
= 1;
10445 /* For other non-GCC compilers, expect their behavior is DWARF version
10449 cu
->checked_producer
= 1;
10452 /* Check for GCC PR debug/45124 fix which is not present in any G++ version up
10453 to 4.5.any while it is present already in G++ 4.6.0 - the PR has been fixed
10454 during 4.6.0 experimental. */
10457 producer_is_gxx_lt_4_6 (struct dwarf2_cu
*cu
)
10459 if (!cu
->checked_producer
)
10460 check_producer (cu
);
10462 return cu
->producer_is_gxx_lt_4_6
;
10465 /* Return the default accessibility type if it is not overriden by
10466 DW_AT_accessibility. */
10468 static enum dwarf_access_attribute
10469 dwarf2_default_access_attribute (struct die_info
*die
, struct dwarf2_cu
*cu
)
10471 if (cu
->header
.version
< 3 || producer_is_gxx_lt_4_6 (cu
))
10473 /* The default DWARF 2 accessibility for members is public, the default
10474 accessibility for inheritance is private. */
10476 if (die
->tag
!= DW_TAG_inheritance
)
10477 return DW_ACCESS_public
;
10479 return DW_ACCESS_private
;
10483 /* DWARF 3+ defines the default accessibility a different way. The same
10484 rules apply now for DW_TAG_inheritance as for the members and it only
10485 depends on the container kind. */
10487 if (die
->parent
->tag
== DW_TAG_class_type
)
10488 return DW_ACCESS_private
;
10490 return DW_ACCESS_public
;
10494 /* Look for DW_AT_data_member_location. Set *OFFSET to the byte
10495 offset. If the attribute was not found return 0, otherwise return
10496 1. If it was found but could not properly be handled, set *OFFSET
10500 handle_data_member_location (struct die_info
*die
, struct dwarf2_cu
*cu
,
10503 struct attribute
*attr
;
10505 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
10510 /* Note that we do not check for a section offset first here.
10511 This is because DW_AT_data_member_location is new in DWARF 4,
10512 so if we see it, we can assume that a constant form is really
10513 a constant and not a section offset. */
10514 if (attr_form_is_constant (attr
))
10515 *offset
= dwarf2_get_attr_constant_value (attr
, 0);
10516 else if (attr_form_is_section_offset (attr
))
10517 dwarf2_complex_location_expr_complaint ();
10518 else if (attr_form_is_block (attr
))
10519 *offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
10521 dwarf2_complex_location_expr_complaint ();
10529 /* Add an aggregate field to the field list. */
10532 dwarf2_add_field (struct field_info
*fip
, struct die_info
*die
,
10533 struct dwarf2_cu
*cu
)
10535 struct objfile
*objfile
= cu
->objfile
;
10536 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
10537 struct nextfield
*new_field
;
10538 struct attribute
*attr
;
10540 const char *fieldname
= "";
10542 /* Allocate a new field list entry and link it in. */
10543 new_field
= (struct nextfield
*) xmalloc (sizeof (struct nextfield
));
10544 make_cleanup (xfree
, new_field
);
10545 memset (new_field
, 0, sizeof (struct nextfield
));
10547 if (die
->tag
== DW_TAG_inheritance
)
10549 new_field
->next
= fip
->baseclasses
;
10550 fip
->baseclasses
= new_field
;
10554 new_field
->next
= fip
->fields
;
10555 fip
->fields
= new_field
;
10559 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
10561 new_field
->accessibility
= DW_UNSND (attr
);
10563 new_field
->accessibility
= dwarf2_default_access_attribute (die
, cu
);
10564 if (new_field
->accessibility
!= DW_ACCESS_public
)
10565 fip
->non_public_fields
= 1;
10567 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
10569 new_field
->virtuality
= DW_UNSND (attr
);
10571 new_field
->virtuality
= DW_VIRTUALITY_none
;
10573 fp
= &new_field
->field
;
10575 if (die
->tag
== DW_TAG_member
&& ! die_is_declaration (die
, cu
))
10579 /* Data member other than a C++ static data member. */
10581 /* Get type of field. */
10582 fp
->type
= die_type (die
, cu
);
10584 SET_FIELD_BITPOS (*fp
, 0);
10586 /* Get bit size of field (zero if none). */
10587 attr
= dwarf2_attr (die
, DW_AT_bit_size
, cu
);
10590 FIELD_BITSIZE (*fp
) = DW_UNSND (attr
);
10594 FIELD_BITSIZE (*fp
) = 0;
10597 /* Get bit offset of field. */
10598 if (handle_data_member_location (die
, cu
, &offset
))
10599 SET_FIELD_BITPOS (*fp
, offset
* bits_per_byte
);
10600 attr
= dwarf2_attr (die
, DW_AT_bit_offset
, cu
);
10603 if (gdbarch_bits_big_endian (gdbarch
))
10605 /* For big endian bits, the DW_AT_bit_offset gives the
10606 additional bit offset from the MSB of the containing
10607 anonymous object to the MSB of the field. We don't
10608 have to do anything special since we don't need to
10609 know the size of the anonymous object. */
10610 SET_FIELD_BITPOS (*fp
, FIELD_BITPOS (*fp
) + DW_UNSND (attr
));
10614 /* For little endian bits, compute the bit offset to the
10615 MSB of the anonymous object, subtract off the number of
10616 bits from the MSB of the field to the MSB of the
10617 object, and then subtract off the number of bits of
10618 the field itself. The result is the bit offset of
10619 the LSB of the field. */
10620 int anonymous_size
;
10621 int bit_offset
= DW_UNSND (attr
);
10623 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
10626 /* The size of the anonymous object containing
10627 the bit field is explicit, so use the
10628 indicated size (in bytes). */
10629 anonymous_size
= DW_UNSND (attr
);
10633 /* The size of the anonymous object containing
10634 the bit field must be inferred from the type
10635 attribute of the data member containing the
10637 anonymous_size
= TYPE_LENGTH (fp
->type
);
10639 SET_FIELD_BITPOS (*fp
,
10640 (FIELD_BITPOS (*fp
)
10641 + anonymous_size
* bits_per_byte
10642 - bit_offset
- FIELD_BITSIZE (*fp
)));
10646 /* Get name of field. */
10647 fieldname
= dwarf2_name (die
, cu
);
10648 if (fieldname
== NULL
)
10651 /* The name is already allocated along with this objfile, so we don't
10652 need to duplicate it for the type. */
10653 fp
->name
= fieldname
;
10655 /* Change accessibility for artificial fields (e.g. virtual table
10656 pointer or virtual base class pointer) to private. */
10657 if (dwarf2_attr (die
, DW_AT_artificial
, cu
))
10659 FIELD_ARTIFICIAL (*fp
) = 1;
10660 new_field
->accessibility
= DW_ACCESS_private
;
10661 fip
->non_public_fields
= 1;
10664 else if (die
->tag
== DW_TAG_member
|| die
->tag
== DW_TAG_variable
)
10666 /* C++ static member. */
10668 /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
10669 is a declaration, but all versions of G++ as of this writing
10670 (so through at least 3.2.1) incorrectly generate
10671 DW_TAG_variable tags. */
10673 const char *physname
;
10675 /* Get name of field. */
10676 fieldname
= dwarf2_name (die
, cu
);
10677 if (fieldname
== NULL
)
10680 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
10682 /* Only create a symbol if this is an external value.
10683 new_symbol checks this and puts the value in the global symbol
10684 table, which we want. If it is not external, new_symbol
10685 will try to put the value in cu->list_in_scope which is wrong. */
10686 && dwarf2_flag_true_p (die
, DW_AT_external
, cu
))
10688 /* A static const member, not much different than an enum as far as
10689 we're concerned, except that we can support more types. */
10690 new_symbol (die
, NULL
, cu
);
10693 /* Get physical name. */
10694 physname
= dwarf2_physname (fieldname
, die
, cu
);
10696 /* The name is already allocated along with this objfile, so we don't
10697 need to duplicate it for the type. */
10698 SET_FIELD_PHYSNAME (*fp
, physname
? physname
: "");
10699 FIELD_TYPE (*fp
) = die_type (die
, cu
);
10700 FIELD_NAME (*fp
) = fieldname
;
10702 else if (die
->tag
== DW_TAG_inheritance
)
10706 /* C++ base class field. */
10707 if (handle_data_member_location (die
, cu
, &offset
))
10708 SET_FIELD_BITPOS (*fp
, offset
* bits_per_byte
);
10709 FIELD_BITSIZE (*fp
) = 0;
10710 FIELD_TYPE (*fp
) = die_type (die
, cu
);
10711 FIELD_NAME (*fp
) = type_name_no_tag (fp
->type
);
10712 fip
->nbaseclasses
++;
10716 /* Add a typedef defined in the scope of the FIP's class. */
10719 dwarf2_add_typedef (struct field_info
*fip
, struct die_info
*die
,
10720 struct dwarf2_cu
*cu
)
10722 struct objfile
*objfile
= cu
->objfile
;
10723 struct typedef_field_list
*new_field
;
10724 struct attribute
*attr
;
10725 struct typedef_field
*fp
;
10726 char *fieldname
= "";
10728 /* Allocate a new field list entry and link it in. */
10729 new_field
= xzalloc (sizeof (*new_field
));
10730 make_cleanup (xfree
, new_field
);
10732 gdb_assert (die
->tag
== DW_TAG_typedef
);
10734 fp
= &new_field
->field
;
10736 /* Get name of field. */
10737 fp
->name
= dwarf2_name (die
, cu
);
10738 if (fp
->name
== NULL
)
10741 fp
->type
= read_type_die (die
, cu
);
10743 new_field
->next
= fip
->typedef_field_list
;
10744 fip
->typedef_field_list
= new_field
;
10745 fip
->typedef_field_list_count
++;
10748 /* Create the vector of fields, and attach it to the type. */
10751 dwarf2_attach_fields_to_type (struct field_info
*fip
, struct type
*type
,
10752 struct dwarf2_cu
*cu
)
10754 int nfields
= fip
->nfields
;
10756 /* Record the field count, allocate space for the array of fields,
10757 and create blank accessibility bitfields if necessary. */
10758 TYPE_NFIELDS (type
) = nfields
;
10759 TYPE_FIELDS (type
) = (struct field
*)
10760 TYPE_ALLOC (type
, sizeof (struct field
) * nfields
);
10761 memset (TYPE_FIELDS (type
), 0, sizeof (struct field
) * nfields
);
10763 if (fip
->non_public_fields
&& cu
->language
!= language_ada
)
10765 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
10767 TYPE_FIELD_PRIVATE_BITS (type
) =
10768 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
10769 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type
), nfields
);
10771 TYPE_FIELD_PROTECTED_BITS (type
) =
10772 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
10773 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type
), nfields
);
10775 TYPE_FIELD_IGNORE_BITS (type
) =
10776 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
10777 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type
), nfields
);
10780 /* If the type has baseclasses, allocate and clear a bit vector for
10781 TYPE_FIELD_VIRTUAL_BITS. */
10782 if (fip
->nbaseclasses
&& cu
->language
!= language_ada
)
10784 int num_bytes
= B_BYTES (fip
->nbaseclasses
);
10785 unsigned char *pointer
;
10787 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
10788 pointer
= TYPE_ALLOC (type
, num_bytes
);
10789 TYPE_FIELD_VIRTUAL_BITS (type
) = pointer
;
10790 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type
), fip
->nbaseclasses
);
10791 TYPE_N_BASECLASSES (type
) = fip
->nbaseclasses
;
10794 /* Copy the saved-up fields into the field vector. Start from the head of
10795 the list, adding to the tail of the field array, so that they end up in
10796 the same order in the array in which they were added to the list. */
10797 while (nfields
-- > 0)
10799 struct nextfield
*fieldp
;
10803 fieldp
= fip
->fields
;
10804 fip
->fields
= fieldp
->next
;
10808 fieldp
= fip
->baseclasses
;
10809 fip
->baseclasses
= fieldp
->next
;
10812 TYPE_FIELD (type
, nfields
) = fieldp
->field
;
10813 switch (fieldp
->accessibility
)
10815 case DW_ACCESS_private
:
10816 if (cu
->language
!= language_ada
)
10817 SET_TYPE_FIELD_PRIVATE (type
, nfields
);
10820 case DW_ACCESS_protected
:
10821 if (cu
->language
!= language_ada
)
10822 SET_TYPE_FIELD_PROTECTED (type
, nfields
);
10825 case DW_ACCESS_public
:
10829 /* Unknown accessibility. Complain and treat it as public. */
10831 complaint (&symfile_complaints
, _("unsupported accessibility %d"),
10832 fieldp
->accessibility
);
10836 if (nfields
< fip
->nbaseclasses
)
10838 switch (fieldp
->virtuality
)
10840 case DW_VIRTUALITY_virtual
:
10841 case DW_VIRTUALITY_pure_virtual
:
10842 if (cu
->language
== language_ada
)
10843 error (_("unexpected virtuality in component of Ada type"));
10844 SET_TYPE_FIELD_VIRTUAL (type
, nfields
);
10851 /* Return true if this member function is a constructor, false
10855 dwarf2_is_constructor (struct die_info
*die
, struct dwarf2_cu
*cu
)
10857 const char *fieldname
;
10858 const char *typename
;
10861 if (die
->parent
== NULL
)
10864 if (die
->parent
->tag
!= DW_TAG_structure_type
10865 && die
->parent
->tag
!= DW_TAG_union_type
10866 && die
->parent
->tag
!= DW_TAG_class_type
)
10869 fieldname
= dwarf2_name (die
, cu
);
10870 typename
= dwarf2_name (die
->parent
, cu
);
10871 if (fieldname
== NULL
|| typename
== NULL
)
10874 len
= strlen (fieldname
);
10875 return (strncmp (fieldname
, typename
, len
) == 0
10876 && (typename
[len
] == '\0' || typename
[len
] == '<'));
10879 /* Add a member function to the proper fieldlist. */
10882 dwarf2_add_member_fn (struct field_info
*fip
, struct die_info
*die
,
10883 struct type
*type
, struct dwarf2_cu
*cu
)
10885 struct objfile
*objfile
= cu
->objfile
;
10886 struct attribute
*attr
;
10887 struct fnfieldlist
*flp
;
10889 struct fn_field
*fnp
;
10890 const char *fieldname
;
10891 struct nextfnfield
*new_fnfield
;
10892 struct type
*this_type
;
10893 enum dwarf_access_attribute accessibility
;
10895 if (cu
->language
== language_ada
)
10896 error (_("unexpected member function in Ada type"));
10898 /* Get name of member function. */
10899 fieldname
= dwarf2_name (die
, cu
);
10900 if (fieldname
== NULL
)
10903 /* Look up member function name in fieldlist. */
10904 for (i
= 0; i
< fip
->nfnfields
; i
++)
10906 if (strcmp (fip
->fnfieldlists
[i
].name
, fieldname
) == 0)
10910 /* Create new list element if necessary. */
10911 if (i
< fip
->nfnfields
)
10912 flp
= &fip
->fnfieldlists
[i
];
10915 if ((fip
->nfnfields
% DW_FIELD_ALLOC_CHUNK
) == 0)
10917 fip
->fnfieldlists
= (struct fnfieldlist
*)
10918 xrealloc (fip
->fnfieldlists
,
10919 (fip
->nfnfields
+ DW_FIELD_ALLOC_CHUNK
)
10920 * sizeof (struct fnfieldlist
));
10921 if (fip
->nfnfields
== 0)
10922 make_cleanup (free_current_contents
, &fip
->fnfieldlists
);
10924 flp
= &fip
->fnfieldlists
[fip
->nfnfields
];
10925 flp
->name
= fieldname
;
10928 i
= fip
->nfnfields
++;
10931 /* Create a new member function field and chain it to the field list
10933 new_fnfield
= (struct nextfnfield
*) xmalloc (sizeof (struct nextfnfield
));
10934 make_cleanup (xfree
, new_fnfield
);
10935 memset (new_fnfield
, 0, sizeof (struct nextfnfield
));
10936 new_fnfield
->next
= flp
->head
;
10937 flp
->head
= new_fnfield
;
10940 /* Fill in the member function field info. */
10941 fnp
= &new_fnfield
->fnfield
;
10943 /* Delay processing of the physname until later. */
10944 if (cu
->language
== language_cplus
|| cu
->language
== language_java
)
10946 add_to_method_list (type
, i
, flp
->length
- 1, fieldname
,
10951 const char *physname
= dwarf2_physname (fieldname
, die
, cu
);
10952 fnp
->physname
= physname
? physname
: "";
10955 fnp
->type
= alloc_type (objfile
);
10956 this_type
= read_type_die (die
, cu
);
10957 if (this_type
&& TYPE_CODE (this_type
) == TYPE_CODE_FUNC
)
10959 int nparams
= TYPE_NFIELDS (this_type
);
10961 /* TYPE is the domain of this method, and THIS_TYPE is the type
10962 of the method itself (TYPE_CODE_METHOD). */
10963 smash_to_method_type (fnp
->type
, type
,
10964 TYPE_TARGET_TYPE (this_type
),
10965 TYPE_FIELDS (this_type
),
10966 TYPE_NFIELDS (this_type
),
10967 TYPE_VARARGS (this_type
));
10969 /* Handle static member functions.
10970 Dwarf2 has no clean way to discern C++ static and non-static
10971 member functions. G++ helps GDB by marking the first
10972 parameter for non-static member functions (which is the this
10973 pointer) as artificial. We obtain this information from
10974 read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
10975 if (nparams
== 0 || TYPE_FIELD_ARTIFICIAL (this_type
, 0) == 0)
10976 fnp
->voffset
= VOFFSET_STATIC
;
10979 complaint (&symfile_complaints
, _("member function type missing for '%s'"),
10980 dwarf2_full_name (fieldname
, die
, cu
));
10982 /* Get fcontext from DW_AT_containing_type if present. */
10983 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
10984 fnp
->fcontext
= die_containing_type (die
, cu
);
10986 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const and
10987 is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
10989 /* Get accessibility. */
10990 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
10992 accessibility
= DW_UNSND (attr
);
10994 accessibility
= dwarf2_default_access_attribute (die
, cu
);
10995 switch (accessibility
)
10997 case DW_ACCESS_private
:
10998 fnp
->is_private
= 1;
11000 case DW_ACCESS_protected
:
11001 fnp
->is_protected
= 1;
11005 /* Check for artificial methods. */
11006 attr
= dwarf2_attr (die
, DW_AT_artificial
, cu
);
11007 if (attr
&& DW_UNSND (attr
) != 0)
11008 fnp
->is_artificial
= 1;
11010 fnp
->is_constructor
= dwarf2_is_constructor (die
, cu
);
11012 /* Get index in virtual function table if it is a virtual member
11013 function. For older versions of GCC, this is an offset in the
11014 appropriate virtual table, as specified by DW_AT_containing_type.
11015 For everyone else, it is an expression to be evaluated relative
11016 to the object address. */
11018 attr
= dwarf2_attr (die
, DW_AT_vtable_elem_location
, cu
);
11021 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
> 0)
11023 if (DW_BLOCK (attr
)->data
[0] == DW_OP_constu
)
11025 /* Old-style GCC. */
11026 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
) + 2;
11028 else if (DW_BLOCK (attr
)->data
[0] == DW_OP_deref
11029 || (DW_BLOCK (attr
)->size
> 1
11030 && DW_BLOCK (attr
)->data
[0] == DW_OP_deref_size
11031 && DW_BLOCK (attr
)->data
[1] == cu
->header
.addr_size
))
11033 struct dwarf_block blk
;
11036 offset
= (DW_BLOCK (attr
)->data
[0] == DW_OP_deref
11038 blk
.size
= DW_BLOCK (attr
)->size
- offset
;
11039 blk
.data
= DW_BLOCK (attr
)->data
+ offset
;
11040 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
);
11041 if ((fnp
->voffset
% cu
->header
.addr_size
) != 0)
11042 dwarf2_complex_location_expr_complaint ();
11044 fnp
->voffset
/= cu
->header
.addr_size
;
11048 dwarf2_complex_location_expr_complaint ();
11050 if (!fnp
->fcontext
)
11051 fnp
->fcontext
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type
, 0));
11053 else if (attr_form_is_section_offset (attr
))
11055 dwarf2_complex_location_expr_complaint ();
11059 dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
11065 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
11066 if (attr
&& DW_UNSND (attr
))
11068 /* GCC does this, as of 2008-08-25; PR debug/37237. */
11069 complaint (&symfile_complaints
,
11070 _("Member function \"%s\" (offset %d) is virtual "
11071 "but the vtable offset is not specified"),
11072 fieldname
, die
->offset
.sect_off
);
11073 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
11074 TYPE_CPLUS_DYNAMIC (type
) = 1;
11079 /* Create the vector of member function fields, and attach it to the type. */
11082 dwarf2_attach_fn_fields_to_type (struct field_info
*fip
, struct type
*type
,
11083 struct dwarf2_cu
*cu
)
11085 struct fnfieldlist
*flp
;
11088 if (cu
->language
== language_ada
)
11089 error (_("unexpected member functions in Ada type"));
11091 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
11092 TYPE_FN_FIELDLISTS (type
) = (struct fn_fieldlist
*)
11093 TYPE_ALLOC (type
, sizeof (struct fn_fieldlist
) * fip
->nfnfields
);
11095 for (i
= 0, flp
= fip
->fnfieldlists
; i
< fip
->nfnfields
; i
++, flp
++)
11097 struct nextfnfield
*nfp
= flp
->head
;
11098 struct fn_fieldlist
*fn_flp
= &TYPE_FN_FIELDLIST (type
, i
);
11101 TYPE_FN_FIELDLIST_NAME (type
, i
) = flp
->name
;
11102 TYPE_FN_FIELDLIST_LENGTH (type
, i
) = flp
->length
;
11103 fn_flp
->fn_fields
= (struct fn_field
*)
11104 TYPE_ALLOC (type
, sizeof (struct fn_field
) * flp
->length
);
11105 for (k
= flp
->length
; (k
--, nfp
); nfp
= nfp
->next
)
11106 fn_flp
->fn_fields
[k
] = nfp
->fnfield
;
11109 TYPE_NFN_FIELDS (type
) = fip
->nfnfields
;
11112 /* Returns non-zero if NAME is the name of a vtable member in CU's
11113 language, zero otherwise. */
11115 is_vtable_name (const char *name
, struct dwarf2_cu
*cu
)
11117 static const char vptr
[] = "_vptr";
11118 static const char vtable
[] = "vtable";
11120 /* Look for the C++ and Java forms of the vtable. */
11121 if ((cu
->language
== language_java
11122 && strncmp (name
, vtable
, sizeof (vtable
) - 1) == 0)
11123 || (strncmp (name
, vptr
, sizeof (vptr
) - 1) == 0
11124 && is_cplus_marker (name
[sizeof (vptr
) - 1])))
11130 /* GCC outputs unnamed structures that are really pointers to member
11131 functions, with the ABI-specified layout. If TYPE describes
11132 such a structure, smash it into a member function type.
11134 GCC shouldn't do this; it should just output pointer to member DIEs.
11135 This is GCC PR debug/28767. */
11138 quirk_gcc_member_function_pointer (struct type
*type
, struct objfile
*objfile
)
11140 struct type
*pfn_type
, *domain_type
, *new_type
;
11142 /* Check for a structure with no name and two children. */
11143 if (TYPE_CODE (type
) != TYPE_CODE_STRUCT
|| TYPE_NFIELDS (type
) != 2)
11146 /* Check for __pfn and __delta members. */
11147 if (TYPE_FIELD_NAME (type
, 0) == NULL
11148 || strcmp (TYPE_FIELD_NAME (type
, 0), "__pfn") != 0
11149 || TYPE_FIELD_NAME (type
, 1) == NULL
11150 || strcmp (TYPE_FIELD_NAME (type
, 1), "__delta") != 0)
11153 /* Find the type of the method. */
11154 pfn_type
= TYPE_FIELD_TYPE (type
, 0);
11155 if (pfn_type
== NULL
11156 || TYPE_CODE (pfn_type
) != TYPE_CODE_PTR
11157 || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type
)) != TYPE_CODE_FUNC
)
11160 /* Look for the "this" argument. */
11161 pfn_type
= TYPE_TARGET_TYPE (pfn_type
);
11162 if (TYPE_NFIELDS (pfn_type
) == 0
11163 /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */
11164 || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type
, 0)) != TYPE_CODE_PTR
)
11167 domain_type
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type
, 0));
11168 new_type
= alloc_type (objfile
);
11169 smash_to_method_type (new_type
, domain_type
, TYPE_TARGET_TYPE (pfn_type
),
11170 TYPE_FIELDS (pfn_type
), TYPE_NFIELDS (pfn_type
),
11171 TYPE_VARARGS (pfn_type
));
11172 smash_to_methodptr_type (type
, new_type
);
11175 /* Return non-zero if the CU's PRODUCER string matches the Intel C/C++ compiler
11179 producer_is_icc (struct dwarf2_cu
*cu
)
11181 if (!cu
->checked_producer
)
11182 check_producer (cu
);
11184 return cu
->producer_is_icc
;
11187 /* Called when we find the DIE that starts a structure or union scope
11188 (definition) to create a type for the structure or union. Fill in
11189 the type's name and general properties; the members will not be
11190 processed until process_structure_type.
11192 NOTE: we need to call these functions regardless of whether or not the
11193 DIE has a DW_AT_name attribute, since it might be an anonymous
11194 structure or union. This gets the type entered into our set of
11195 user defined types.
11197 However, if the structure is incomplete (an opaque struct/union)
11198 then suppress creating a symbol table entry for it since gdb only
11199 wants to find the one with the complete definition. Note that if
11200 it is complete, we just call new_symbol, which does it's own
11201 checking about whether the struct/union is anonymous or not (and
11202 suppresses creating a symbol table entry itself). */
11204 static struct type
*
11205 read_structure_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
11207 struct objfile
*objfile
= cu
->objfile
;
11209 struct attribute
*attr
;
11212 /* If the definition of this type lives in .debug_types, read that type.
11213 Don't follow DW_AT_specification though, that will take us back up
11214 the chain and we want to go down. */
11215 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
);
11218 struct dwarf2_cu
*type_cu
= cu
;
11219 struct die_info
*type_die
= follow_die_ref_or_sig (die
, attr
, &type_cu
);
11221 /* We could just recurse on read_structure_type, but we need to call
11222 get_die_type to ensure only one type for this DIE is created.
11223 This is important, for example, because for c++ classes we need
11224 TYPE_NAME set which is only done by new_symbol. Blech. */
11225 type
= read_type_die (type_die
, type_cu
);
11227 /* TYPE_CU may not be the same as CU.
11228 Ensure TYPE is recorded in CU's type_hash table. */
11229 return set_die_type (die
, type
, cu
);
11232 type
= alloc_type (objfile
);
11233 INIT_CPLUS_SPECIFIC (type
);
11235 name
= dwarf2_name (die
, cu
);
11238 if (cu
->language
== language_cplus
11239 || cu
->language
== language_java
)
11241 const char *full_name
= dwarf2_full_name (name
, die
, cu
);
11243 /* dwarf2_full_name might have already finished building the DIE's
11244 type. If so, there is no need to continue. */
11245 if (get_die_type (die
, cu
) != NULL
)
11246 return get_die_type (die
, cu
);
11248 TYPE_TAG_NAME (type
) = full_name
;
11249 if (die
->tag
== DW_TAG_structure_type
11250 || die
->tag
== DW_TAG_class_type
)
11251 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
11255 /* The name is already allocated along with this objfile, so
11256 we don't need to duplicate it for the type. */
11257 TYPE_TAG_NAME (type
) = name
;
11258 if (die
->tag
== DW_TAG_class_type
)
11259 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
11263 if (die
->tag
== DW_TAG_structure_type
)
11265 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
11267 else if (die
->tag
== DW_TAG_union_type
)
11269 TYPE_CODE (type
) = TYPE_CODE_UNION
;
11273 TYPE_CODE (type
) = TYPE_CODE_CLASS
;
11276 if (cu
->language
== language_cplus
&& die
->tag
== DW_TAG_class_type
)
11277 TYPE_DECLARED_CLASS (type
) = 1;
11279 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
11282 TYPE_LENGTH (type
) = DW_UNSND (attr
);
11286 TYPE_LENGTH (type
) = 0;
11289 if (producer_is_icc (cu
))
11291 /* ICC does not output the required DW_AT_declaration
11292 on incomplete types, but gives them a size of zero. */
11295 TYPE_STUB_SUPPORTED (type
) = 1;
11297 if (die_is_declaration (die
, cu
))
11298 TYPE_STUB (type
) = 1;
11299 else if (attr
== NULL
&& die
->child
== NULL
11300 && producer_is_realview (cu
->producer
))
11301 /* RealView does not output the required DW_AT_declaration
11302 on incomplete types. */
11303 TYPE_STUB (type
) = 1;
11305 /* We need to add the type field to the die immediately so we don't
11306 infinitely recurse when dealing with pointers to the structure
11307 type within the structure itself. */
11308 set_die_type (die
, type
, cu
);
11310 /* set_die_type should be already done. */
11311 set_descriptive_type (type
, die
, cu
);
11316 /* Finish creating a structure or union type, including filling in
11317 its members and creating a symbol for it. */
11320 process_structure_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11322 struct objfile
*objfile
= cu
->objfile
;
11323 struct die_info
*child_die
= die
->child
;
11326 type
= get_die_type (die
, cu
);
11328 type
= read_structure_type (die
, cu
);
11330 if (die
->child
!= NULL
&& ! die_is_declaration (die
, cu
))
11332 struct field_info fi
;
11333 struct die_info
*child_die
;
11334 VEC (symbolp
) *template_args
= NULL
;
11335 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
11337 memset (&fi
, 0, sizeof (struct field_info
));
11339 child_die
= die
->child
;
11341 while (child_die
&& child_die
->tag
)
11343 if (child_die
->tag
== DW_TAG_member
11344 || child_die
->tag
== DW_TAG_variable
)
11346 /* NOTE: carlton/2002-11-05: A C++ static data member
11347 should be a DW_TAG_member that is a declaration, but
11348 all versions of G++ as of this writing (so through at
11349 least 3.2.1) incorrectly generate DW_TAG_variable
11350 tags for them instead. */
11351 dwarf2_add_field (&fi
, child_die
, cu
);
11353 else if (child_die
->tag
== DW_TAG_subprogram
)
11355 /* C++ member function. */
11356 dwarf2_add_member_fn (&fi
, child_die
, type
, cu
);
11358 else if (child_die
->tag
== DW_TAG_inheritance
)
11360 /* C++ base class field. */
11361 dwarf2_add_field (&fi
, child_die
, cu
);
11363 else if (child_die
->tag
== DW_TAG_typedef
)
11364 dwarf2_add_typedef (&fi
, child_die
, cu
);
11365 else if (child_die
->tag
== DW_TAG_template_type_param
11366 || child_die
->tag
== DW_TAG_template_value_param
)
11368 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
11371 VEC_safe_push (symbolp
, template_args
, arg
);
11374 child_die
= sibling_die (child_die
);
11377 /* Attach template arguments to type. */
11378 if (! VEC_empty (symbolp
, template_args
))
11380 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
11381 TYPE_N_TEMPLATE_ARGUMENTS (type
)
11382 = VEC_length (symbolp
, template_args
);
11383 TYPE_TEMPLATE_ARGUMENTS (type
)
11384 = obstack_alloc (&objfile
->objfile_obstack
,
11385 (TYPE_N_TEMPLATE_ARGUMENTS (type
)
11386 * sizeof (struct symbol
*)));
11387 memcpy (TYPE_TEMPLATE_ARGUMENTS (type
),
11388 VEC_address (symbolp
, template_args
),
11389 (TYPE_N_TEMPLATE_ARGUMENTS (type
)
11390 * sizeof (struct symbol
*)));
11391 VEC_free (symbolp
, template_args
);
11394 /* Attach fields and member functions to the type. */
11396 dwarf2_attach_fields_to_type (&fi
, type
, cu
);
11399 dwarf2_attach_fn_fields_to_type (&fi
, type
, cu
);
11401 /* Get the type which refers to the base class (possibly this
11402 class itself) which contains the vtable pointer for the current
11403 class from the DW_AT_containing_type attribute. This use of
11404 DW_AT_containing_type is a GNU extension. */
11406 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
11408 struct type
*t
= die_containing_type (die
, cu
);
11410 TYPE_VPTR_BASETYPE (type
) = t
;
11415 /* Our own class provides vtbl ptr. */
11416 for (i
= TYPE_NFIELDS (t
) - 1;
11417 i
>= TYPE_N_BASECLASSES (t
);
11420 const char *fieldname
= TYPE_FIELD_NAME (t
, i
);
11422 if (is_vtable_name (fieldname
, cu
))
11424 TYPE_VPTR_FIELDNO (type
) = i
;
11429 /* Complain if virtual function table field not found. */
11430 if (i
< TYPE_N_BASECLASSES (t
))
11431 complaint (&symfile_complaints
,
11432 _("virtual function table pointer "
11433 "not found when defining class '%s'"),
11434 TYPE_TAG_NAME (type
) ? TYPE_TAG_NAME (type
) :
11439 TYPE_VPTR_FIELDNO (type
) = TYPE_VPTR_FIELDNO (t
);
11442 else if (cu
->producer
11443 && strncmp (cu
->producer
,
11444 "IBM(R) XL C/C++ Advanced Edition", 32) == 0)
11446 /* The IBM XLC compiler does not provide direct indication
11447 of the containing type, but the vtable pointer is
11448 always named __vfp. */
11452 for (i
= TYPE_NFIELDS (type
) - 1;
11453 i
>= TYPE_N_BASECLASSES (type
);
11456 if (strcmp (TYPE_FIELD_NAME (type
, i
), "__vfp") == 0)
11458 TYPE_VPTR_FIELDNO (type
) = i
;
11459 TYPE_VPTR_BASETYPE (type
) = type
;
11466 /* Copy fi.typedef_field_list linked list elements content into the
11467 allocated array TYPE_TYPEDEF_FIELD_ARRAY (type). */
11468 if (fi
.typedef_field_list
)
11470 int i
= fi
.typedef_field_list_count
;
11472 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
11473 TYPE_TYPEDEF_FIELD_ARRAY (type
)
11474 = TYPE_ALLOC (type
, sizeof (TYPE_TYPEDEF_FIELD (type
, 0)) * i
);
11475 TYPE_TYPEDEF_FIELD_COUNT (type
) = i
;
11477 /* Reverse the list order to keep the debug info elements order. */
11480 struct typedef_field
*dest
, *src
;
11482 dest
= &TYPE_TYPEDEF_FIELD (type
, i
);
11483 src
= &fi
.typedef_field_list
->field
;
11484 fi
.typedef_field_list
= fi
.typedef_field_list
->next
;
11489 do_cleanups (back_to
);
11491 if (HAVE_CPLUS_STRUCT (type
))
11492 TYPE_CPLUS_REALLY_JAVA (type
) = cu
->language
== language_java
;
11495 quirk_gcc_member_function_pointer (type
, objfile
);
11497 /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its
11498 snapshots) has been known to create a die giving a declaration
11499 for a class that has, as a child, a die giving a definition for a
11500 nested class. So we have to process our children even if the
11501 current die is a declaration. Normally, of course, a declaration
11502 won't have any children at all. */
11504 while (child_die
!= NULL
&& child_die
->tag
)
11506 if (child_die
->tag
== DW_TAG_member
11507 || child_die
->tag
== DW_TAG_variable
11508 || child_die
->tag
== DW_TAG_inheritance
11509 || child_die
->tag
== DW_TAG_template_value_param
11510 || child_die
->tag
== DW_TAG_template_type_param
)
11515 process_die (child_die
, cu
);
11517 child_die
= sibling_die (child_die
);
11520 /* Do not consider external references. According to the DWARF standard,
11521 these DIEs are identified by the fact that they have no byte_size
11522 attribute, and a declaration attribute. */
11523 if (dwarf2_attr (die
, DW_AT_byte_size
, cu
) != NULL
11524 || !die_is_declaration (die
, cu
))
11525 new_symbol (die
, type
, cu
);
11528 /* Given a DW_AT_enumeration_type die, set its type. We do not
11529 complete the type's fields yet, or create any symbols. */
11531 static struct type
*
11532 read_enumeration_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
11534 struct objfile
*objfile
= cu
->objfile
;
11536 struct attribute
*attr
;
11539 /* If the definition of this type lives in .debug_types, read that type.
11540 Don't follow DW_AT_specification though, that will take us back up
11541 the chain and we want to go down. */
11542 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
);
11545 struct dwarf2_cu
*type_cu
= cu
;
11546 struct die_info
*type_die
= follow_die_ref_or_sig (die
, attr
, &type_cu
);
11548 type
= read_type_die (type_die
, type_cu
);
11550 /* TYPE_CU may not be the same as CU.
11551 Ensure TYPE is recorded in CU's type_hash table. */
11552 return set_die_type (die
, type
, cu
);
11555 type
= alloc_type (objfile
);
11557 TYPE_CODE (type
) = TYPE_CODE_ENUM
;
11558 name
= dwarf2_full_name (NULL
, die
, cu
);
11560 TYPE_TAG_NAME (type
) = name
;
11562 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
11565 TYPE_LENGTH (type
) = DW_UNSND (attr
);
11569 TYPE_LENGTH (type
) = 0;
11572 /* The enumeration DIE can be incomplete. In Ada, any type can be
11573 declared as private in the package spec, and then defined only
11574 inside the package body. Such types are known as Taft Amendment
11575 Types. When another package uses such a type, an incomplete DIE
11576 may be generated by the compiler. */
11577 if (die_is_declaration (die
, cu
))
11578 TYPE_STUB (type
) = 1;
11580 return set_die_type (die
, type
, cu
);
11583 /* Given a pointer to a die which begins an enumeration, process all
11584 the dies that define the members of the enumeration, and create the
11585 symbol for the enumeration type.
11587 NOTE: We reverse the order of the element list. */
11590 process_enumeration_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11592 struct type
*this_type
;
11594 this_type
= get_die_type (die
, cu
);
11595 if (this_type
== NULL
)
11596 this_type
= read_enumeration_type (die
, cu
);
11598 if (die
->child
!= NULL
)
11600 struct die_info
*child_die
;
11601 struct symbol
*sym
;
11602 struct field
*fields
= NULL
;
11603 int num_fields
= 0;
11604 int unsigned_enum
= 1;
11609 child_die
= die
->child
;
11610 while (child_die
&& child_die
->tag
)
11612 if (child_die
->tag
!= DW_TAG_enumerator
)
11614 process_die (child_die
, cu
);
11618 name
= dwarf2_name (child_die
, cu
);
11621 sym
= new_symbol (child_die
, this_type
, cu
);
11622 if (SYMBOL_VALUE (sym
) < 0)
11627 else if ((mask
& SYMBOL_VALUE (sym
)) != 0)
11630 mask
|= SYMBOL_VALUE (sym
);
11632 if ((num_fields
% DW_FIELD_ALLOC_CHUNK
) == 0)
11634 fields
= (struct field
*)
11636 (num_fields
+ DW_FIELD_ALLOC_CHUNK
)
11637 * sizeof (struct field
));
11640 FIELD_NAME (fields
[num_fields
]) = SYMBOL_LINKAGE_NAME (sym
);
11641 FIELD_TYPE (fields
[num_fields
]) = NULL
;
11642 SET_FIELD_ENUMVAL (fields
[num_fields
], SYMBOL_VALUE (sym
));
11643 FIELD_BITSIZE (fields
[num_fields
]) = 0;
11649 child_die
= sibling_die (child_die
);
11654 TYPE_NFIELDS (this_type
) = num_fields
;
11655 TYPE_FIELDS (this_type
) = (struct field
*)
11656 TYPE_ALLOC (this_type
, sizeof (struct field
) * num_fields
);
11657 memcpy (TYPE_FIELDS (this_type
), fields
,
11658 sizeof (struct field
) * num_fields
);
11662 TYPE_UNSIGNED (this_type
) = 1;
11664 TYPE_FLAG_ENUM (this_type
) = 1;
11667 /* If we are reading an enum from a .debug_types unit, and the enum
11668 is a declaration, and the enum is not the signatured type in the
11669 unit, then we do not want to add a symbol for it. Adding a
11670 symbol would in some cases obscure the true definition of the
11671 enum, giving users an incomplete type when the definition is
11672 actually available. Note that we do not want to do this for all
11673 enums which are just declarations, because C++0x allows forward
11674 enum declarations. */
11675 if (cu
->per_cu
->is_debug_types
11676 && die_is_declaration (die
, cu
))
11678 struct signatured_type
*sig_type
;
11681 = lookup_signatured_type_at_offset (dwarf2_per_objfile
->objfile
,
11682 cu
->per_cu
->info_or_types_section
,
11683 cu
->per_cu
->offset
);
11684 gdb_assert (sig_type
->type_offset_in_section
.sect_off
!= 0);
11685 if (sig_type
->type_offset_in_section
.sect_off
!= die
->offset
.sect_off
)
11689 new_symbol (die
, this_type
, cu
);
11692 /* Extract all information from a DW_TAG_array_type DIE and put it in
11693 the DIE's type field. For now, this only handles one dimensional
11696 static struct type
*
11697 read_array_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
11699 struct objfile
*objfile
= cu
->objfile
;
11700 struct die_info
*child_die
;
11702 struct type
*element_type
, *range_type
, *index_type
;
11703 struct type
**range_types
= NULL
;
11704 struct attribute
*attr
;
11706 struct cleanup
*back_to
;
11709 element_type
= die_type (die
, cu
);
11711 /* The die_type call above may have already set the type for this DIE. */
11712 type
= get_die_type (die
, cu
);
11716 /* Irix 6.2 native cc creates array types without children for
11717 arrays with unspecified length. */
11718 if (die
->child
== NULL
)
11720 index_type
= objfile_type (objfile
)->builtin_int
;
11721 range_type
= create_range_type (NULL
, index_type
, 0, -1);
11722 type
= create_array_type (NULL
, element_type
, range_type
);
11723 return set_die_type (die
, type
, cu
);
11726 back_to
= make_cleanup (null_cleanup
, NULL
);
11727 child_die
= die
->child
;
11728 while (child_die
&& child_die
->tag
)
11730 if (child_die
->tag
== DW_TAG_subrange_type
)
11732 struct type
*child_type
= read_type_die (child_die
, cu
);
11734 if (child_type
!= NULL
)
11736 /* The range type was succesfully read. Save it for the
11737 array type creation. */
11738 if ((ndim
% DW_FIELD_ALLOC_CHUNK
) == 0)
11740 range_types
= (struct type
**)
11741 xrealloc (range_types
, (ndim
+ DW_FIELD_ALLOC_CHUNK
)
11742 * sizeof (struct type
*));
11744 make_cleanup (free_current_contents
, &range_types
);
11746 range_types
[ndim
++] = child_type
;
11749 child_die
= sibling_die (child_die
);
11752 /* Dwarf2 dimensions are output from left to right, create the
11753 necessary array types in backwards order. */
11755 type
= element_type
;
11757 if (read_array_order (die
, cu
) == DW_ORD_col_major
)
11762 type
= create_array_type (NULL
, type
, range_types
[i
++]);
11767 type
= create_array_type (NULL
, type
, range_types
[ndim
]);
11770 /* Understand Dwarf2 support for vector types (like they occur on
11771 the PowerPC w/ AltiVec). Gcc just adds another attribute to the
11772 array type. This is not part of the Dwarf2/3 standard yet, but a
11773 custom vendor extension. The main difference between a regular
11774 array and the vector variant is that vectors are passed by value
11776 attr
= dwarf2_attr (die
, DW_AT_GNU_vector
, cu
);
11778 make_vector_type (type
);
11780 /* The DIE may have DW_AT_byte_size set. For example an OpenCL
11781 implementation may choose to implement triple vectors using this
11783 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
11786 if (DW_UNSND (attr
) >= TYPE_LENGTH (type
))
11787 TYPE_LENGTH (type
) = DW_UNSND (attr
);
11789 complaint (&symfile_complaints
,
11790 _("DW_AT_byte_size for array type smaller "
11791 "than the total size of elements"));
11794 name
= dwarf2_name (die
, cu
);
11796 TYPE_NAME (type
) = name
;
11798 /* Install the type in the die. */
11799 set_die_type (die
, type
, cu
);
11801 /* set_die_type should be already done. */
11802 set_descriptive_type (type
, die
, cu
);
11804 do_cleanups (back_to
);
11809 static enum dwarf_array_dim_ordering
11810 read_array_order (struct die_info
*die
, struct dwarf2_cu
*cu
)
11812 struct attribute
*attr
;
11814 attr
= dwarf2_attr (die
, DW_AT_ordering
, cu
);
11816 if (attr
) return DW_SND (attr
);
11818 /* GNU F77 is a special case, as at 08/2004 array type info is the
11819 opposite order to the dwarf2 specification, but data is still
11820 laid out as per normal fortran.
11822 FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need
11823 version checking. */
11825 if (cu
->language
== language_fortran
11826 && cu
->producer
&& strstr (cu
->producer
, "GNU F77"))
11828 return DW_ORD_row_major
;
11831 switch (cu
->language_defn
->la_array_ordering
)
11833 case array_column_major
:
11834 return DW_ORD_col_major
;
11835 case array_row_major
:
11837 return DW_ORD_row_major
;
11841 /* Extract all information from a DW_TAG_set_type DIE and put it in
11842 the DIE's type field. */
11844 static struct type
*
11845 read_set_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
11847 struct type
*domain_type
, *set_type
;
11848 struct attribute
*attr
;
11850 domain_type
= die_type (die
, cu
);
11852 /* The die_type call above may have already set the type for this DIE. */
11853 set_type
= get_die_type (die
, cu
);
11857 set_type
= create_set_type (NULL
, domain_type
);
11859 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
11861 TYPE_LENGTH (set_type
) = DW_UNSND (attr
);
11863 return set_die_type (die
, set_type
, cu
);
11866 /* A helper for read_common_block that creates a locexpr baton.
11867 SYM is the symbol which we are marking as computed.
11868 COMMON_DIE is the DIE for the common block.
11869 COMMON_LOC is the location expression attribute for the common
11871 MEMBER_LOC is the location expression attribute for the particular
11872 member of the common block that we are processing.
11873 CU is the CU from which the above come. */
11876 mark_common_block_symbol_computed (struct symbol
*sym
,
11877 struct die_info
*common_die
,
11878 struct attribute
*common_loc
,
11879 struct attribute
*member_loc
,
11880 struct dwarf2_cu
*cu
)
11882 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11883 struct dwarf2_locexpr_baton
*baton
;
11885 unsigned int cu_off
;
11886 enum bfd_endian byte_order
= gdbarch_byte_order (get_objfile_arch (objfile
));
11887 LONGEST offset
= 0;
11889 gdb_assert (common_loc
&& member_loc
);
11890 gdb_assert (attr_form_is_block (common_loc
));
11891 gdb_assert (attr_form_is_block (member_loc
)
11892 || attr_form_is_constant (member_loc
));
11894 baton
= obstack_alloc (&objfile
->objfile_obstack
,
11895 sizeof (struct dwarf2_locexpr_baton
));
11896 baton
->per_cu
= cu
->per_cu
;
11897 gdb_assert (baton
->per_cu
);
11899 baton
->size
= 5 /* DW_OP_call4 */ + 1 /* DW_OP_plus */;
11901 if (attr_form_is_constant (member_loc
))
11903 offset
= dwarf2_get_attr_constant_value (member_loc
, 0);
11904 baton
->size
+= 1 /* DW_OP_addr */ + cu
->header
.addr_size
;
11907 baton
->size
+= DW_BLOCK (member_loc
)->size
;
11909 ptr
= obstack_alloc (&objfile
->objfile_obstack
, baton
->size
);
11912 *ptr
++ = DW_OP_call4
;
11913 cu_off
= common_die
->offset
.sect_off
- cu
->per_cu
->offset
.sect_off
;
11914 store_unsigned_integer (ptr
, 4, byte_order
, cu_off
);
11917 if (attr_form_is_constant (member_loc
))
11919 *ptr
++ = DW_OP_addr
;
11920 store_unsigned_integer (ptr
, cu
->header
.addr_size
, byte_order
, offset
);
11921 ptr
+= cu
->header
.addr_size
;
11925 /* We have to copy the data here, because DW_OP_call4 will only
11926 use a DW_AT_location attribute. */
11927 memcpy (ptr
, DW_BLOCK (member_loc
)->data
, DW_BLOCK (member_loc
)->size
);
11928 ptr
+= DW_BLOCK (member_loc
)->size
;
11931 *ptr
++ = DW_OP_plus
;
11932 gdb_assert (ptr
- baton
->data
== baton
->size
);
11934 SYMBOL_COMPUTED_OPS (sym
) = &dwarf2_locexpr_funcs
;
11935 SYMBOL_LOCATION_BATON (sym
) = baton
;
11936 SYMBOL_CLASS (sym
) = LOC_COMPUTED
;
11939 /* Create appropriate locally-scoped variables for all the
11940 DW_TAG_common_block entries. Also create a struct common_block
11941 listing all such variables for `info common'. COMMON_BLOCK_DOMAIN
11942 is used to sepate the common blocks name namespace from regular
11946 read_common_block (struct die_info
*die
, struct dwarf2_cu
*cu
)
11948 struct attribute
*attr
;
11950 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
11953 /* Support the .debug_loc offsets. */
11954 if (attr_form_is_block (attr
))
11958 else if (attr_form_is_section_offset (attr
))
11960 dwarf2_complex_location_expr_complaint ();
11965 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
11966 "common block member");
11971 if (die
->child
!= NULL
)
11973 struct objfile
*objfile
= cu
->objfile
;
11974 struct die_info
*child_die
;
11975 size_t n_entries
= 0, size
;
11976 struct common_block
*common_block
;
11977 struct symbol
*sym
;
11979 for (child_die
= die
->child
;
11980 child_die
&& child_die
->tag
;
11981 child_die
= sibling_die (child_die
))
11984 size
= (sizeof (struct common_block
)
11985 + (n_entries
- 1) * sizeof (struct symbol
*));
11986 common_block
= obstack_alloc (&objfile
->objfile_obstack
, size
);
11987 memset (common_block
->contents
, 0, n_entries
* sizeof (struct symbol
*));
11988 common_block
->n_entries
= 0;
11990 for (child_die
= die
->child
;
11991 child_die
&& child_die
->tag
;
11992 child_die
= sibling_die (child_die
))
11994 /* Create the symbol in the DW_TAG_common_block block in the current
11996 sym
= new_symbol (child_die
, NULL
, cu
);
11999 struct attribute
*member_loc
;
12001 common_block
->contents
[common_block
->n_entries
++] = sym
;
12003 member_loc
= dwarf2_attr (child_die
, DW_AT_data_member_location
,
12007 /* GDB has handled this for a long time, but it is
12008 not specified by DWARF. It seems to have been
12009 emitted by gfortran at least as recently as:
12010 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23057. */
12011 complaint (&symfile_complaints
,
12012 _("Variable in common block has "
12013 "DW_AT_data_member_location "
12014 "- DIE at 0x%x [in module %s]"),
12015 child_die
->offset
.sect_off
, cu
->objfile
->name
);
12017 if (attr_form_is_section_offset (member_loc
))
12018 dwarf2_complex_location_expr_complaint ();
12019 else if (attr_form_is_constant (member_loc
)
12020 || attr_form_is_block (member_loc
))
12023 mark_common_block_symbol_computed (sym
, die
, attr
,
12027 dwarf2_complex_location_expr_complaint ();
12032 sym
= new_symbol (die
, objfile_type (objfile
)->builtin_void
, cu
);
12033 SYMBOL_VALUE_COMMON_BLOCK (sym
) = common_block
;
12037 /* Create a type for a C++ namespace. */
12039 static struct type
*
12040 read_namespace_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
12042 struct objfile
*objfile
= cu
->objfile
;
12043 const char *previous_prefix
, *name
;
12047 /* For extensions, reuse the type of the original namespace. */
12048 if (dwarf2_attr (die
, DW_AT_extension
, cu
) != NULL
)
12050 struct die_info
*ext_die
;
12051 struct dwarf2_cu
*ext_cu
= cu
;
12053 ext_die
= dwarf2_extension (die
, &ext_cu
);
12054 type
= read_type_die (ext_die
, ext_cu
);
12056 /* EXT_CU may not be the same as CU.
12057 Ensure TYPE is recorded in CU's type_hash table. */
12058 return set_die_type (die
, type
, cu
);
12061 name
= namespace_name (die
, &is_anonymous
, cu
);
12063 /* Now build the name of the current namespace. */
12065 previous_prefix
= determine_prefix (die
, cu
);
12066 if (previous_prefix
[0] != '\0')
12067 name
= typename_concat (&objfile
->objfile_obstack
,
12068 previous_prefix
, name
, 0, cu
);
12070 /* Create the type. */
12071 type
= init_type (TYPE_CODE_NAMESPACE
, 0, 0, NULL
,
12073 TYPE_NAME (type
) = name
;
12074 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
12076 return set_die_type (die
, type
, cu
);
12079 /* Read a C++ namespace. */
12082 read_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
12084 struct objfile
*objfile
= cu
->objfile
;
12087 /* Add a symbol associated to this if we haven't seen the namespace
12088 before. Also, add a using directive if it's an anonymous
12091 if (dwarf2_attr (die
, DW_AT_extension
, cu
) == NULL
)
12095 type
= read_type_die (die
, cu
);
12096 new_symbol (die
, type
, cu
);
12098 namespace_name (die
, &is_anonymous
, cu
);
12101 const char *previous_prefix
= determine_prefix (die
, cu
);
12103 cp_add_using_directive (previous_prefix
, TYPE_NAME (type
), NULL
,
12104 NULL
, NULL
, 0, &objfile
->objfile_obstack
);
12108 if (die
->child
!= NULL
)
12110 struct die_info
*child_die
= die
->child
;
12112 while (child_die
&& child_die
->tag
)
12114 process_die (child_die
, cu
);
12115 child_die
= sibling_die (child_die
);
12120 /* Read a Fortran module as type. This DIE can be only a declaration used for
12121 imported module. Still we need that type as local Fortran "use ... only"
12122 declaration imports depend on the created type in determine_prefix. */
12124 static struct type
*
12125 read_module_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
12127 struct objfile
*objfile
= cu
->objfile
;
12128 const char *module_name
;
12131 module_name
= dwarf2_name (die
, cu
);
12133 complaint (&symfile_complaints
,
12134 _("DW_TAG_module has no name, offset 0x%x"),
12135 die
->offset
.sect_off
);
12136 type
= init_type (TYPE_CODE_MODULE
, 0, 0, module_name
, objfile
);
12138 /* determine_prefix uses TYPE_TAG_NAME. */
12139 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
12141 return set_die_type (die
, type
, cu
);
12144 /* Read a Fortran module. */
12147 read_module (struct die_info
*die
, struct dwarf2_cu
*cu
)
12149 struct die_info
*child_die
= die
->child
;
12151 while (child_die
&& child_die
->tag
)
12153 process_die (child_die
, cu
);
12154 child_die
= sibling_die (child_die
);
12158 /* Return the name of the namespace represented by DIE. Set
12159 *IS_ANONYMOUS to tell whether or not the namespace is an anonymous
12162 static const char *
12163 namespace_name (struct die_info
*die
, int *is_anonymous
, struct dwarf2_cu
*cu
)
12165 struct die_info
*current_die
;
12166 const char *name
= NULL
;
12168 /* Loop through the extensions until we find a name. */
12170 for (current_die
= die
;
12171 current_die
!= NULL
;
12172 current_die
= dwarf2_extension (die
, &cu
))
12174 name
= dwarf2_name (current_die
, cu
);
12179 /* Is it an anonymous namespace? */
12181 *is_anonymous
= (name
== NULL
);
12183 name
= CP_ANONYMOUS_NAMESPACE_STR
;
12188 /* Extract all information from a DW_TAG_pointer_type DIE and add to
12189 the user defined type vector. */
12191 static struct type
*
12192 read_tag_pointer_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
12194 struct gdbarch
*gdbarch
= get_objfile_arch (cu
->objfile
);
12195 struct comp_unit_head
*cu_header
= &cu
->header
;
12197 struct attribute
*attr_byte_size
;
12198 struct attribute
*attr_address_class
;
12199 int byte_size
, addr_class
;
12200 struct type
*target_type
;
12202 target_type
= die_type (die
, cu
);
12204 /* The die_type call above may have already set the type for this DIE. */
12205 type
= get_die_type (die
, cu
);
12209 type
= lookup_pointer_type (target_type
);
12211 attr_byte_size
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
12212 if (attr_byte_size
)
12213 byte_size
= DW_UNSND (attr_byte_size
);
12215 byte_size
= cu_header
->addr_size
;
12217 attr_address_class
= dwarf2_attr (die
, DW_AT_address_class
, cu
);
12218 if (attr_address_class
)
12219 addr_class
= DW_UNSND (attr_address_class
);
12221 addr_class
= DW_ADDR_none
;
12223 /* If the pointer size or address class is different than the
12224 default, create a type variant marked as such and set the
12225 length accordingly. */
12226 if (TYPE_LENGTH (type
) != byte_size
|| addr_class
!= DW_ADDR_none
)
12228 if (gdbarch_address_class_type_flags_p (gdbarch
))
12232 type_flags
= gdbarch_address_class_type_flags
12233 (gdbarch
, byte_size
, addr_class
);
12234 gdb_assert ((type_flags
& ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL
)
12236 type
= make_type_with_address_space (type
, type_flags
);
12238 else if (TYPE_LENGTH (type
) != byte_size
)
12240 complaint (&symfile_complaints
,
12241 _("invalid pointer size %d"), byte_size
);
12245 /* Should we also complain about unhandled address classes? */
12249 TYPE_LENGTH (type
) = byte_size
;
12250 return set_die_type (die
, type
, cu
);
12253 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
12254 the user defined type vector. */
12256 static struct type
*
12257 read_tag_ptr_to_member_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
12260 struct type
*to_type
;
12261 struct type
*domain
;
12263 to_type
= die_type (die
, cu
);
12264 domain
= die_containing_type (die
, cu
);
12266 /* The calls above may have already set the type for this DIE. */
12267 type
= get_die_type (die
, cu
);
12271 if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_METHOD
)
12272 type
= lookup_methodptr_type (to_type
);
12274 type
= lookup_memberptr_type (to_type
, domain
);
12276 return set_die_type (die
, type
, cu
);
12279 /* Extract all information from a DW_TAG_reference_type DIE and add to
12280 the user defined type vector. */
12282 static struct type
*
12283 read_tag_reference_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
12285 struct comp_unit_head
*cu_header
= &cu
->header
;
12286 struct type
*type
, *target_type
;
12287 struct attribute
*attr
;
12289 target_type
= die_type (die
, cu
);
12291 /* The die_type call above may have already set the type for this DIE. */
12292 type
= get_die_type (die
, cu
);
12296 type
= lookup_reference_type (target_type
);
12297 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
12300 TYPE_LENGTH (type
) = DW_UNSND (attr
);
12304 TYPE_LENGTH (type
) = cu_header
->addr_size
;
12306 return set_die_type (die
, type
, cu
);
12309 static struct type
*
12310 read_tag_const_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
12312 struct type
*base_type
, *cv_type
;
12314 base_type
= die_type (die
, cu
);
12316 /* The die_type call above may have already set the type for this DIE. */
12317 cv_type
= get_die_type (die
, cu
);
12321 /* In case the const qualifier is applied to an array type, the element type
12322 is so qualified, not the array type (section 6.7.3 of C99). */
12323 if (TYPE_CODE (base_type
) == TYPE_CODE_ARRAY
)
12325 struct type
*el_type
, *inner_array
;
12327 base_type
= copy_type (base_type
);
12328 inner_array
= base_type
;
12330 while (TYPE_CODE (TYPE_TARGET_TYPE (inner_array
)) == TYPE_CODE_ARRAY
)
12332 TYPE_TARGET_TYPE (inner_array
) =
12333 copy_type (TYPE_TARGET_TYPE (inner_array
));
12334 inner_array
= TYPE_TARGET_TYPE (inner_array
);
12337 el_type
= TYPE_TARGET_TYPE (inner_array
);
12338 TYPE_TARGET_TYPE (inner_array
) =
12339 make_cv_type (1, TYPE_VOLATILE (el_type
), el_type
, NULL
);
12341 return set_die_type (die
, base_type
, cu
);
12344 cv_type
= make_cv_type (1, TYPE_VOLATILE (base_type
), base_type
, 0);
12345 return set_die_type (die
, cv_type
, cu
);
12348 static struct type
*
12349 read_tag_volatile_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
12351 struct type
*base_type
, *cv_type
;
12353 base_type
= die_type (die
, cu
);
12355 /* The die_type call above may have already set the type for this DIE. */
12356 cv_type
= get_die_type (die
, cu
);
12360 cv_type
= make_cv_type (TYPE_CONST (base_type
), 1, base_type
, 0);
12361 return set_die_type (die
, cv_type
, cu
);
12364 /* Handle DW_TAG_restrict_type. */
12366 static struct type
*
12367 read_tag_restrict_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
12369 struct type
*base_type
, *cv_type
;
12371 base_type
= die_type (die
, cu
);
12373 /* The die_type call above may have already set the type for this DIE. */
12374 cv_type
= get_die_type (die
, cu
);
12378 cv_type
= make_restrict_type (base_type
);
12379 return set_die_type (die
, cv_type
, cu
);
12382 /* Extract all information from a DW_TAG_string_type DIE and add to
12383 the user defined type vector. It isn't really a user defined type,
12384 but it behaves like one, with other DIE's using an AT_user_def_type
12385 attribute to reference it. */
12387 static struct type
*
12388 read_tag_string_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
12390 struct objfile
*objfile
= cu
->objfile
;
12391 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
12392 struct type
*type
, *range_type
, *index_type
, *char_type
;
12393 struct attribute
*attr
;
12394 unsigned int length
;
12396 attr
= dwarf2_attr (die
, DW_AT_string_length
, cu
);
12399 length
= DW_UNSND (attr
);
12403 /* Check for the DW_AT_byte_size attribute. */
12404 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
12407 length
= DW_UNSND (attr
);
12415 index_type
= objfile_type (objfile
)->builtin_int
;
12416 range_type
= create_range_type (NULL
, index_type
, 1, length
);
12417 char_type
= language_string_char_type (cu
->language_defn
, gdbarch
);
12418 type
= create_string_type (NULL
, char_type
, range_type
);
12420 return set_die_type (die
, type
, cu
);
12423 /* Handle DIES due to C code like:
12427 int (*funcp)(int a, long l);
12431 ('funcp' generates a DW_TAG_subroutine_type DIE). */
12433 static struct type
*
12434 read_subroutine_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
12436 struct objfile
*objfile
= cu
->objfile
;
12437 struct type
*type
; /* Type that this function returns. */
12438 struct type
*ftype
; /* Function that returns above type. */
12439 struct attribute
*attr
;
12441 type
= die_type (die
, cu
);
12443 /* The die_type call above may have already set the type for this DIE. */
12444 ftype
= get_die_type (die
, cu
);
12448 ftype
= lookup_function_type (type
);
12450 /* All functions in C++, Pascal and Java have prototypes. */
12451 attr
= dwarf2_attr (die
, DW_AT_prototyped
, cu
);
12452 if ((attr
&& (DW_UNSND (attr
) != 0))
12453 || cu
->language
== language_cplus
12454 || cu
->language
== language_java
12455 || cu
->language
== language_pascal
)
12456 TYPE_PROTOTYPED (ftype
) = 1;
12457 else if (producer_is_realview (cu
->producer
))
12458 /* RealView does not emit DW_AT_prototyped. We can not
12459 distinguish prototyped and unprototyped functions; default to
12460 prototyped, since that is more common in modern code (and
12461 RealView warns about unprototyped functions). */
12462 TYPE_PROTOTYPED (ftype
) = 1;
12464 /* Store the calling convention in the type if it's available in
12465 the subroutine die. Otherwise set the calling convention to
12466 the default value DW_CC_normal. */
12467 attr
= dwarf2_attr (die
, DW_AT_calling_convention
, cu
);
12469 TYPE_CALLING_CONVENTION (ftype
) = DW_UNSND (attr
);
12470 else if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL"))
12471 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_GDB_IBM_OpenCL
;
12473 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_normal
;
12475 /* We need to add the subroutine type to the die immediately so
12476 we don't infinitely recurse when dealing with parameters
12477 declared as the same subroutine type. */
12478 set_die_type (die
, ftype
, cu
);
12480 if (die
->child
!= NULL
)
12482 struct type
*void_type
= objfile_type (objfile
)->builtin_void
;
12483 struct die_info
*child_die
;
12484 int nparams
, iparams
;
12486 /* Count the number of parameters.
12487 FIXME: GDB currently ignores vararg functions, but knows about
12488 vararg member functions. */
12490 child_die
= die
->child
;
12491 while (child_die
&& child_die
->tag
)
12493 if (child_die
->tag
== DW_TAG_formal_parameter
)
12495 else if (child_die
->tag
== DW_TAG_unspecified_parameters
)
12496 TYPE_VARARGS (ftype
) = 1;
12497 child_die
= sibling_die (child_die
);
12500 /* Allocate storage for parameters and fill them in. */
12501 TYPE_NFIELDS (ftype
) = nparams
;
12502 TYPE_FIELDS (ftype
) = (struct field
*)
12503 TYPE_ZALLOC (ftype
, nparams
* sizeof (struct field
));
12505 /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it
12506 even if we error out during the parameters reading below. */
12507 for (iparams
= 0; iparams
< nparams
; iparams
++)
12508 TYPE_FIELD_TYPE (ftype
, iparams
) = void_type
;
12511 child_die
= die
->child
;
12512 while (child_die
&& child_die
->tag
)
12514 if (child_die
->tag
== DW_TAG_formal_parameter
)
12516 struct type
*arg_type
;
12518 /* DWARF version 2 has no clean way to discern C++
12519 static and non-static member functions. G++ helps
12520 GDB by marking the first parameter for non-static
12521 member functions (which is the this pointer) as
12522 artificial. We pass this information to
12523 dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL.
12525 DWARF version 3 added DW_AT_object_pointer, which GCC
12526 4.5 does not yet generate. */
12527 attr
= dwarf2_attr (child_die
, DW_AT_artificial
, cu
);
12529 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = DW_UNSND (attr
);
12532 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 0;
12534 /* GCC/43521: In java, the formal parameter
12535 "this" is sometimes not marked with DW_AT_artificial. */
12536 if (cu
->language
== language_java
)
12538 const char *name
= dwarf2_name (child_die
, cu
);
12540 if (name
&& !strcmp (name
, "this"))
12541 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 1;
12544 arg_type
= die_type (child_die
, cu
);
12546 /* RealView does not mark THIS as const, which the testsuite
12547 expects. GCC marks THIS as const in method definitions,
12548 but not in the class specifications (GCC PR 43053). */
12549 if (cu
->language
== language_cplus
&& !TYPE_CONST (arg_type
)
12550 && TYPE_FIELD_ARTIFICIAL (ftype
, iparams
))
12553 struct dwarf2_cu
*arg_cu
= cu
;
12554 const char *name
= dwarf2_name (child_die
, cu
);
12556 attr
= dwarf2_attr (die
, DW_AT_object_pointer
, cu
);
12559 /* If the compiler emits this, use it. */
12560 if (follow_die_ref (die
, attr
, &arg_cu
) == child_die
)
12563 else if (name
&& strcmp (name
, "this") == 0)
12564 /* Function definitions will have the argument names. */
12566 else if (name
== NULL
&& iparams
== 0)
12567 /* Declarations may not have the names, so like
12568 elsewhere in GDB, assume an artificial first
12569 argument is "this". */
12573 arg_type
= make_cv_type (1, TYPE_VOLATILE (arg_type
),
12577 TYPE_FIELD_TYPE (ftype
, iparams
) = arg_type
;
12580 child_die
= sibling_die (child_die
);
12587 static struct type
*
12588 read_typedef (struct die_info
*die
, struct dwarf2_cu
*cu
)
12590 struct objfile
*objfile
= cu
->objfile
;
12591 const char *name
= NULL
;
12592 struct type
*this_type
, *target_type
;
12594 name
= dwarf2_full_name (NULL
, die
, cu
);
12595 this_type
= init_type (TYPE_CODE_TYPEDEF
, 0,
12596 TYPE_FLAG_TARGET_STUB
, NULL
, objfile
);
12597 TYPE_NAME (this_type
) = name
;
12598 set_die_type (die
, this_type
, cu
);
12599 target_type
= die_type (die
, cu
);
12600 if (target_type
!= this_type
)
12601 TYPE_TARGET_TYPE (this_type
) = target_type
;
12604 /* Self-referential typedefs are, it seems, not allowed by the DWARF
12605 spec and cause infinite loops in GDB. */
12606 complaint (&symfile_complaints
,
12607 _("Self-referential DW_TAG_typedef "
12608 "- DIE at 0x%x [in module %s]"),
12609 die
->offset
.sect_off
, objfile
->name
);
12610 TYPE_TARGET_TYPE (this_type
) = NULL
;
12615 /* Find a representation of a given base type and install
12616 it in the TYPE field of the die. */
12618 static struct type
*
12619 read_base_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
12621 struct objfile
*objfile
= cu
->objfile
;
12623 struct attribute
*attr
;
12624 int encoding
= 0, size
= 0;
12626 enum type_code code
= TYPE_CODE_INT
;
12627 int type_flags
= 0;
12628 struct type
*target_type
= NULL
;
12630 attr
= dwarf2_attr (die
, DW_AT_encoding
, cu
);
12633 encoding
= DW_UNSND (attr
);
12635 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
12638 size
= DW_UNSND (attr
);
12640 name
= dwarf2_name (die
, cu
);
12643 complaint (&symfile_complaints
,
12644 _("DW_AT_name missing from DW_TAG_base_type"));
12649 case DW_ATE_address
:
12650 /* Turn DW_ATE_address into a void * pointer. */
12651 code
= TYPE_CODE_PTR
;
12652 type_flags
|= TYPE_FLAG_UNSIGNED
;
12653 target_type
= init_type (TYPE_CODE_VOID
, 1, 0, NULL
, objfile
);
12655 case DW_ATE_boolean
:
12656 code
= TYPE_CODE_BOOL
;
12657 type_flags
|= TYPE_FLAG_UNSIGNED
;
12659 case DW_ATE_complex_float
:
12660 code
= TYPE_CODE_COMPLEX
;
12661 target_type
= init_type (TYPE_CODE_FLT
, size
/ 2, 0, NULL
, objfile
);
12663 case DW_ATE_decimal_float
:
12664 code
= TYPE_CODE_DECFLOAT
;
12667 code
= TYPE_CODE_FLT
;
12669 case DW_ATE_signed
:
12671 case DW_ATE_unsigned
:
12672 type_flags
|= TYPE_FLAG_UNSIGNED
;
12673 if (cu
->language
== language_fortran
12675 && strncmp (name
, "character(", sizeof ("character(") - 1) == 0)
12676 code
= TYPE_CODE_CHAR
;
12678 case DW_ATE_signed_char
:
12679 if (cu
->language
== language_ada
|| cu
->language
== language_m2
12680 || cu
->language
== language_pascal
12681 || cu
->language
== language_fortran
)
12682 code
= TYPE_CODE_CHAR
;
12684 case DW_ATE_unsigned_char
:
12685 if (cu
->language
== language_ada
|| cu
->language
== language_m2
12686 || cu
->language
== language_pascal
12687 || cu
->language
== language_fortran
)
12688 code
= TYPE_CODE_CHAR
;
12689 type_flags
|= TYPE_FLAG_UNSIGNED
;
12692 /* We just treat this as an integer and then recognize the
12693 type by name elsewhere. */
12697 complaint (&symfile_complaints
, _("unsupported DW_AT_encoding: '%s'"),
12698 dwarf_type_encoding_name (encoding
));
12702 type
= init_type (code
, size
, type_flags
, NULL
, objfile
);
12703 TYPE_NAME (type
) = name
;
12704 TYPE_TARGET_TYPE (type
) = target_type
;
12706 if (name
&& strcmp (name
, "char") == 0)
12707 TYPE_NOSIGN (type
) = 1;
12709 return set_die_type (die
, type
, cu
);
12712 /* Read the given DW_AT_subrange DIE. */
12714 static struct type
*
12715 read_subrange_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
12717 struct type
*base_type
;
12718 struct type
*range_type
;
12719 struct attribute
*attr
;
12721 int low_default_is_valid
;
12723 LONGEST negative_mask
;
12725 base_type
= die_type (die
, cu
);
12726 /* Preserve BASE_TYPE's original type, just set its LENGTH. */
12727 check_typedef (base_type
);
12729 /* The die_type call above may have already set the type for this DIE. */
12730 range_type
= get_die_type (die
, cu
);
12734 /* Set LOW_DEFAULT_IS_VALID if current language and DWARF version allow
12735 omitting DW_AT_lower_bound. */
12736 switch (cu
->language
)
12739 case language_cplus
:
12741 low_default_is_valid
= 1;
12743 case language_fortran
:
12745 low_default_is_valid
= 1;
12748 case language_java
:
12749 case language_objc
:
12751 low_default_is_valid
= (cu
->header
.version
>= 4);
12755 case language_pascal
:
12757 low_default_is_valid
= (cu
->header
.version
>= 4);
12761 low_default_is_valid
= 0;
12765 /* FIXME: For variable sized arrays either of these could be
12766 a variable rather than a constant value. We'll allow it,
12767 but we don't know how to handle it. */
12768 attr
= dwarf2_attr (die
, DW_AT_lower_bound
, cu
);
12770 low
= dwarf2_get_attr_constant_value (attr
, low
);
12771 else if (!low_default_is_valid
)
12772 complaint (&symfile_complaints
, _("Missing DW_AT_lower_bound "
12773 "- DIE at 0x%x [in module %s]"),
12774 die
->offset
.sect_off
, cu
->objfile
->name
);
12776 attr
= dwarf2_attr (die
, DW_AT_upper_bound
, cu
);
12779 if (attr_form_is_block (attr
) || is_ref_attr (attr
))
12781 /* GCC encodes arrays with unspecified or dynamic length
12782 with a DW_FORM_block1 attribute or a reference attribute.
12783 FIXME: GDB does not yet know how to handle dynamic
12784 arrays properly, treat them as arrays with unspecified
12787 FIXME: jimb/2003-09-22: GDB does not really know
12788 how to handle arrays of unspecified length
12789 either; we just represent them as zero-length
12790 arrays. Choose an appropriate upper bound given
12791 the lower bound we've computed above. */
12795 high
= dwarf2_get_attr_constant_value (attr
, 1);
12799 attr
= dwarf2_attr (die
, DW_AT_count
, cu
);
12802 int count
= dwarf2_get_attr_constant_value (attr
, 1);
12803 high
= low
+ count
- 1;
12807 /* Unspecified array length. */
12812 /* Dwarf-2 specifications explicitly allows to create subrange types
12813 without specifying a base type.
12814 In that case, the base type must be set to the type of
12815 the lower bound, upper bound or count, in that order, if any of these
12816 three attributes references an object that has a type.
12817 If no base type is found, the Dwarf-2 specifications say that
12818 a signed integer type of size equal to the size of an address should
12820 For the following C code: `extern char gdb_int [];'
12821 GCC produces an empty range DIE.
12822 FIXME: muller/2010-05-28: Possible references to object for low bound,
12823 high bound or count are not yet handled by this code. */
12824 if (TYPE_CODE (base_type
) == TYPE_CODE_VOID
)
12826 struct objfile
*objfile
= cu
->objfile
;
12827 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
12828 int addr_size
= gdbarch_addr_bit (gdbarch
) /8;
12829 struct type
*int_type
= objfile_type (objfile
)->builtin_int
;
12831 /* Test "int", "long int", and "long long int" objfile types,
12832 and select the first one having a size above or equal to the
12833 architecture address size. */
12834 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
12835 base_type
= int_type
;
12838 int_type
= objfile_type (objfile
)->builtin_long
;
12839 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
12840 base_type
= int_type
;
12843 int_type
= objfile_type (objfile
)->builtin_long_long
;
12844 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
12845 base_type
= int_type
;
12851 (LONGEST
) -1 << (TYPE_LENGTH (base_type
) * TARGET_CHAR_BIT
- 1);
12852 if (!TYPE_UNSIGNED (base_type
) && (low
& negative_mask
))
12853 low
|= negative_mask
;
12854 if (!TYPE_UNSIGNED (base_type
) && (high
& negative_mask
))
12855 high
|= negative_mask
;
12857 range_type
= create_range_type (NULL
, base_type
, low
, high
);
12859 /* Mark arrays with dynamic length at least as an array of unspecified
12860 length. GDB could check the boundary but before it gets implemented at
12861 least allow accessing the array elements. */
12862 if (attr
&& attr_form_is_block (attr
))
12863 TYPE_HIGH_BOUND_UNDEFINED (range_type
) = 1;
12865 /* Ada expects an empty array on no boundary attributes. */
12866 if (attr
== NULL
&& cu
->language
!= language_ada
)
12867 TYPE_HIGH_BOUND_UNDEFINED (range_type
) = 1;
12869 name
= dwarf2_name (die
, cu
);
12871 TYPE_NAME (range_type
) = name
;
12873 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
12875 TYPE_LENGTH (range_type
) = DW_UNSND (attr
);
12877 set_die_type (die
, range_type
, cu
);
12879 /* set_die_type should be already done. */
12880 set_descriptive_type (range_type
, die
, cu
);
12885 static struct type
*
12886 read_unspecified_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
12890 /* For now, we only support the C meaning of an unspecified type: void. */
12892 type
= init_type (TYPE_CODE_VOID
, 0, 0, NULL
, cu
->objfile
);
12893 TYPE_NAME (type
) = dwarf2_name (die
, cu
);
12895 return set_die_type (die
, type
, cu
);
12898 /* Read a single die and all its descendents. Set the die's sibling
12899 field to NULL; set other fields in the die correctly, and set all
12900 of the descendents' fields correctly. Set *NEW_INFO_PTR to the
12901 location of the info_ptr after reading all of those dies. PARENT
12902 is the parent of the die in question. */
12904 static struct die_info
*
12905 read_die_and_children (const struct die_reader_specs
*reader
,
12906 gdb_byte
*info_ptr
,
12907 gdb_byte
**new_info_ptr
,
12908 struct die_info
*parent
)
12910 struct die_info
*die
;
12914 cur_ptr
= read_full_die (reader
, &die
, info_ptr
, &has_children
);
12917 *new_info_ptr
= cur_ptr
;
12920 store_in_ref_table (die
, reader
->cu
);
12923 die
->child
= read_die_and_siblings (reader
, cur_ptr
, new_info_ptr
, die
);
12927 *new_info_ptr
= cur_ptr
;
12930 die
->sibling
= NULL
;
12931 die
->parent
= parent
;
12935 /* Read a die, all of its descendents, and all of its siblings; set
12936 all of the fields of all of the dies correctly. Arguments are as
12937 in read_die_and_children. */
12939 static struct die_info
*
12940 read_die_and_siblings (const struct die_reader_specs
*reader
,
12941 gdb_byte
*info_ptr
,
12942 gdb_byte
**new_info_ptr
,
12943 struct die_info
*parent
)
12945 struct die_info
*first_die
, *last_sibling
;
12948 cur_ptr
= info_ptr
;
12949 first_die
= last_sibling
= NULL
;
12953 struct die_info
*die
12954 = read_die_and_children (reader
, cur_ptr
, &cur_ptr
, parent
);
12958 *new_info_ptr
= cur_ptr
;
12965 last_sibling
->sibling
= die
;
12967 last_sibling
= die
;
12971 /* Read a die and all its attributes, leave space for NUM_EXTRA_ATTRS
12973 The caller is responsible for filling in the extra attributes
12974 and updating (*DIEP)->num_attrs.
12975 Set DIEP to point to a newly allocated die with its information,
12976 except for its child, sibling, and parent fields.
12977 Set HAS_CHILDREN to tell whether the die has children or not. */
12980 read_full_die_1 (const struct die_reader_specs
*reader
,
12981 struct die_info
**diep
, gdb_byte
*info_ptr
,
12982 int *has_children
, int num_extra_attrs
)
12984 unsigned int abbrev_number
, bytes_read
, i
;
12985 sect_offset offset
;
12986 struct abbrev_info
*abbrev
;
12987 struct die_info
*die
;
12988 struct dwarf2_cu
*cu
= reader
->cu
;
12989 bfd
*abfd
= reader
->abfd
;
12991 offset
.sect_off
= info_ptr
- reader
->buffer
;
12992 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
12993 info_ptr
+= bytes_read
;
12994 if (!abbrev_number
)
13001 abbrev
= abbrev_table_lookup_abbrev (cu
->abbrev_table
, abbrev_number
);
13003 error (_("Dwarf Error: could not find abbrev number %d [in module %s]"),
13005 bfd_get_filename (abfd
));
13007 die
= dwarf_alloc_die (cu
, abbrev
->num_attrs
+ num_extra_attrs
);
13008 die
->offset
= offset
;
13009 die
->tag
= abbrev
->tag
;
13010 die
->abbrev
= abbrev_number
;
13012 /* Make the result usable.
13013 The caller needs to update num_attrs after adding the extra
13015 die
->num_attrs
= abbrev
->num_attrs
;
13017 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
13018 info_ptr
= read_attribute (reader
, &die
->attrs
[i
], &abbrev
->attrs
[i
],
13022 *has_children
= abbrev
->has_children
;
13026 /* Read a die and all its attributes.
13027 Set DIEP to point to a newly allocated die with its information,
13028 except for its child, sibling, and parent fields.
13029 Set HAS_CHILDREN to tell whether the die has children or not. */
13032 read_full_die (const struct die_reader_specs
*reader
,
13033 struct die_info
**diep
, gdb_byte
*info_ptr
,
13036 return read_full_die_1 (reader
, diep
, info_ptr
, has_children
, 0);
13039 /* Abbreviation tables.
13041 In DWARF version 2, the description of the debugging information is
13042 stored in a separate .debug_abbrev section. Before we read any
13043 dies from a section we read in all abbreviations and install them
13044 in a hash table. */
13046 /* Allocate space for a struct abbrev_info object in ABBREV_TABLE. */
13048 static struct abbrev_info
*
13049 abbrev_table_alloc_abbrev (struct abbrev_table
*abbrev_table
)
13051 struct abbrev_info
*abbrev
;
13053 abbrev
= (struct abbrev_info
*)
13054 obstack_alloc (&abbrev_table
->abbrev_obstack
, sizeof (struct abbrev_info
));
13055 memset (abbrev
, 0, sizeof (struct abbrev_info
));
13059 /* Add an abbreviation to the table. */
13062 abbrev_table_add_abbrev (struct abbrev_table
*abbrev_table
,
13063 unsigned int abbrev_number
,
13064 struct abbrev_info
*abbrev
)
13066 unsigned int hash_number
;
13068 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
13069 abbrev
->next
= abbrev_table
->abbrevs
[hash_number
];
13070 abbrev_table
->abbrevs
[hash_number
] = abbrev
;
13073 /* Look up an abbrev in the table.
13074 Returns NULL if the abbrev is not found. */
13076 static struct abbrev_info
*
13077 abbrev_table_lookup_abbrev (const struct abbrev_table
*abbrev_table
,
13078 unsigned int abbrev_number
)
13080 unsigned int hash_number
;
13081 struct abbrev_info
*abbrev
;
13083 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
13084 abbrev
= abbrev_table
->abbrevs
[hash_number
];
13088 if (abbrev
->number
== abbrev_number
)
13090 abbrev
= abbrev
->next
;
13095 /* Read in an abbrev table. */
13097 static struct abbrev_table
*
13098 abbrev_table_read_table (struct dwarf2_section_info
*section
,
13099 sect_offset offset
)
13101 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
13102 bfd
*abfd
= section
->asection
->owner
;
13103 struct abbrev_table
*abbrev_table
;
13104 gdb_byte
*abbrev_ptr
;
13105 struct abbrev_info
*cur_abbrev
;
13106 unsigned int abbrev_number
, bytes_read
, abbrev_name
;
13107 unsigned int abbrev_form
;
13108 struct attr_abbrev
*cur_attrs
;
13109 unsigned int allocated_attrs
;
13111 abbrev_table
= XMALLOC (struct abbrev_table
);
13112 abbrev_table
->offset
= offset
;
13113 obstack_init (&abbrev_table
->abbrev_obstack
);
13114 abbrev_table
->abbrevs
= obstack_alloc (&abbrev_table
->abbrev_obstack
,
13116 * sizeof (struct abbrev_info
*)));
13117 memset (abbrev_table
->abbrevs
, 0,
13118 ABBREV_HASH_SIZE
* sizeof (struct abbrev_info
*));
13120 dwarf2_read_section (objfile
, section
);
13121 abbrev_ptr
= section
->buffer
+ offset
.sect_off
;
13122 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
13123 abbrev_ptr
+= bytes_read
;
13125 allocated_attrs
= ATTR_ALLOC_CHUNK
;
13126 cur_attrs
= xmalloc (allocated_attrs
* sizeof (struct attr_abbrev
));
13128 /* Loop until we reach an abbrev number of 0. */
13129 while (abbrev_number
)
13131 cur_abbrev
= abbrev_table_alloc_abbrev (abbrev_table
);
13133 /* read in abbrev header */
13134 cur_abbrev
->number
= abbrev_number
;
13135 cur_abbrev
->tag
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
13136 abbrev_ptr
+= bytes_read
;
13137 cur_abbrev
->has_children
= read_1_byte (abfd
, abbrev_ptr
);
13140 /* now read in declarations */
13141 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
13142 abbrev_ptr
+= bytes_read
;
13143 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
13144 abbrev_ptr
+= bytes_read
;
13145 while (abbrev_name
)
13147 if (cur_abbrev
->num_attrs
== allocated_attrs
)
13149 allocated_attrs
+= ATTR_ALLOC_CHUNK
;
13151 = xrealloc (cur_attrs
, (allocated_attrs
13152 * sizeof (struct attr_abbrev
)));
13155 cur_attrs
[cur_abbrev
->num_attrs
].name
= abbrev_name
;
13156 cur_attrs
[cur_abbrev
->num_attrs
++].form
= abbrev_form
;
13157 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
13158 abbrev_ptr
+= bytes_read
;
13159 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
13160 abbrev_ptr
+= bytes_read
;
13163 cur_abbrev
->attrs
= obstack_alloc (&abbrev_table
->abbrev_obstack
,
13164 (cur_abbrev
->num_attrs
13165 * sizeof (struct attr_abbrev
)));
13166 memcpy (cur_abbrev
->attrs
, cur_attrs
,
13167 cur_abbrev
->num_attrs
* sizeof (struct attr_abbrev
));
13169 abbrev_table_add_abbrev (abbrev_table
, abbrev_number
, cur_abbrev
);
13171 /* Get next abbreviation.
13172 Under Irix6 the abbreviations for a compilation unit are not
13173 always properly terminated with an abbrev number of 0.
13174 Exit loop if we encounter an abbreviation which we have
13175 already read (which means we are about to read the abbreviations
13176 for the next compile unit) or if the end of the abbreviation
13177 table is reached. */
13178 if ((unsigned int) (abbrev_ptr
- section
->buffer
) >= section
->size
)
13180 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
13181 abbrev_ptr
+= bytes_read
;
13182 if (abbrev_table_lookup_abbrev (abbrev_table
, abbrev_number
) != NULL
)
13187 return abbrev_table
;
13190 /* Free the resources held by ABBREV_TABLE. */
13193 abbrev_table_free (struct abbrev_table
*abbrev_table
)
13195 obstack_free (&abbrev_table
->abbrev_obstack
, NULL
);
13196 xfree (abbrev_table
);
13199 /* Same as abbrev_table_free but as a cleanup.
13200 We pass in a pointer to the pointer to the table so that we can
13201 set the pointer to NULL when we're done. It also simplifies
13202 build_type_unit_groups. */
13205 abbrev_table_free_cleanup (void *table_ptr
)
13207 struct abbrev_table
**abbrev_table_ptr
= table_ptr
;
13209 if (*abbrev_table_ptr
!= NULL
)
13210 abbrev_table_free (*abbrev_table_ptr
);
13211 *abbrev_table_ptr
= NULL
;
13214 /* Read the abbrev table for CU from ABBREV_SECTION. */
13217 dwarf2_read_abbrevs (struct dwarf2_cu
*cu
,
13218 struct dwarf2_section_info
*abbrev_section
)
13221 abbrev_table_read_table (abbrev_section
, cu
->header
.abbrev_offset
);
13224 /* Release the memory used by the abbrev table for a compilation unit. */
13227 dwarf2_free_abbrev_table (void *ptr_to_cu
)
13229 struct dwarf2_cu
*cu
= ptr_to_cu
;
13231 abbrev_table_free (cu
->abbrev_table
);
13232 /* Set this to NULL so that we SEGV if we try to read it later,
13233 and also because free_comp_unit verifies this is NULL. */
13234 cu
->abbrev_table
= NULL
;
13237 /* Returns nonzero if TAG represents a type that we might generate a partial
13241 is_type_tag_for_partial (int tag
)
13246 /* Some types that would be reasonable to generate partial symbols for,
13247 that we don't at present. */
13248 case DW_TAG_array_type
:
13249 case DW_TAG_file_type
:
13250 case DW_TAG_ptr_to_member_type
:
13251 case DW_TAG_set_type
:
13252 case DW_TAG_string_type
:
13253 case DW_TAG_subroutine_type
:
13255 case DW_TAG_base_type
:
13256 case DW_TAG_class_type
:
13257 case DW_TAG_interface_type
:
13258 case DW_TAG_enumeration_type
:
13259 case DW_TAG_structure_type
:
13260 case DW_TAG_subrange_type
:
13261 case DW_TAG_typedef
:
13262 case DW_TAG_union_type
:
13269 /* Load all DIEs that are interesting for partial symbols into memory. */
13271 static struct partial_die_info
*
13272 load_partial_dies (const struct die_reader_specs
*reader
,
13273 gdb_byte
*info_ptr
, int building_psymtab
)
13275 struct dwarf2_cu
*cu
= reader
->cu
;
13276 struct objfile
*objfile
= cu
->objfile
;
13277 struct partial_die_info
*part_die
;
13278 struct partial_die_info
*parent_die
, *last_die
, *first_die
= NULL
;
13279 struct abbrev_info
*abbrev
;
13280 unsigned int bytes_read
;
13281 unsigned int load_all
= 0;
13282 int nesting_level
= 1;
13287 gdb_assert (cu
->per_cu
!= NULL
);
13288 if (cu
->per_cu
->load_all_dies
)
13292 = htab_create_alloc_ex (cu
->header
.length
/ 12,
13296 &cu
->comp_unit_obstack
,
13297 hashtab_obstack_allocate
,
13298 dummy_obstack_deallocate
);
13300 part_die
= obstack_alloc (&cu
->comp_unit_obstack
,
13301 sizeof (struct partial_die_info
));
13305 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
13307 /* A NULL abbrev means the end of a series of children. */
13308 if (abbrev
== NULL
)
13310 if (--nesting_level
== 0)
13312 /* PART_DIE was probably the last thing allocated on the
13313 comp_unit_obstack, so we could call obstack_free
13314 here. We don't do that because the waste is small,
13315 and will be cleaned up when we're done with this
13316 compilation unit. This way, we're also more robust
13317 against other users of the comp_unit_obstack. */
13320 info_ptr
+= bytes_read
;
13321 last_die
= parent_die
;
13322 parent_die
= parent_die
->die_parent
;
13326 /* Check for template arguments. We never save these; if
13327 they're seen, we just mark the parent, and go on our way. */
13328 if (parent_die
!= NULL
13329 && cu
->language
== language_cplus
13330 && (abbrev
->tag
== DW_TAG_template_type_param
13331 || abbrev
->tag
== DW_TAG_template_value_param
))
13333 parent_die
->has_template_arguments
= 1;
13337 /* We don't need a partial DIE for the template argument. */
13338 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
13343 /* We only recurse into c++ subprograms looking for template arguments.
13344 Skip their other children. */
13346 && cu
->language
== language_cplus
13347 && parent_die
!= NULL
13348 && parent_die
->tag
== DW_TAG_subprogram
)
13350 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
13354 /* Check whether this DIE is interesting enough to save. Normally
13355 we would not be interested in members here, but there may be
13356 later variables referencing them via DW_AT_specification (for
13357 static members). */
13359 && !is_type_tag_for_partial (abbrev
->tag
)
13360 && abbrev
->tag
!= DW_TAG_constant
13361 && abbrev
->tag
!= DW_TAG_enumerator
13362 && abbrev
->tag
!= DW_TAG_subprogram
13363 && abbrev
->tag
!= DW_TAG_lexical_block
13364 && abbrev
->tag
!= DW_TAG_variable
13365 && abbrev
->tag
!= DW_TAG_namespace
13366 && abbrev
->tag
!= DW_TAG_module
13367 && abbrev
->tag
!= DW_TAG_member
13368 && abbrev
->tag
!= DW_TAG_imported_unit
)
13370 /* Otherwise we skip to the next sibling, if any. */
13371 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
13375 info_ptr
= read_partial_die (reader
, part_die
, abbrev
, bytes_read
,
13378 /* This two-pass algorithm for processing partial symbols has a
13379 high cost in cache pressure. Thus, handle some simple cases
13380 here which cover the majority of C partial symbols. DIEs
13381 which neither have specification tags in them, nor could have
13382 specification tags elsewhere pointing at them, can simply be
13383 processed and discarded.
13385 This segment is also optional; scan_partial_symbols and
13386 add_partial_symbol will handle these DIEs if we chain
13387 them in normally. When compilers which do not emit large
13388 quantities of duplicate debug information are more common,
13389 this code can probably be removed. */
13391 /* Any complete simple types at the top level (pretty much all
13392 of them, for a language without namespaces), can be processed
13394 if (parent_die
== NULL
13395 && part_die
->has_specification
== 0
13396 && part_die
->is_declaration
== 0
13397 && ((part_die
->tag
== DW_TAG_typedef
&& !part_die
->has_children
)
13398 || part_die
->tag
== DW_TAG_base_type
13399 || part_die
->tag
== DW_TAG_subrange_type
))
13401 if (building_psymtab
&& part_die
->name
!= NULL
)
13402 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
), 0,
13403 VAR_DOMAIN
, LOC_TYPEDEF
,
13404 &objfile
->static_psymbols
,
13405 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
13406 info_ptr
= locate_pdi_sibling (reader
, part_die
, info_ptr
);
13410 /* The exception for DW_TAG_typedef with has_children above is
13411 a workaround of GCC PR debug/47510. In the case of this complaint
13412 type_name_no_tag_or_error will error on such types later.
13414 GDB skipped children of DW_TAG_typedef by the shortcut above and then
13415 it could not find the child DIEs referenced later, this is checked
13416 above. In correct DWARF DW_TAG_typedef should have no children. */
13418 if (part_die
->tag
== DW_TAG_typedef
&& part_die
->has_children
)
13419 complaint (&symfile_complaints
,
13420 _("DW_TAG_typedef has childen - GCC PR debug/47510 bug "
13421 "- DIE at 0x%x [in module %s]"),
13422 part_die
->offset
.sect_off
, objfile
->name
);
13424 /* If we're at the second level, and we're an enumerator, and
13425 our parent has no specification (meaning possibly lives in a
13426 namespace elsewhere), then we can add the partial symbol now
13427 instead of queueing it. */
13428 if (part_die
->tag
== DW_TAG_enumerator
13429 && parent_die
!= NULL
13430 && parent_die
->die_parent
== NULL
13431 && parent_die
->tag
== DW_TAG_enumeration_type
13432 && parent_die
->has_specification
== 0)
13434 if (part_die
->name
== NULL
)
13435 complaint (&symfile_complaints
,
13436 _("malformed enumerator DIE ignored"));
13437 else if (building_psymtab
)
13438 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
), 0,
13439 VAR_DOMAIN
, LOC_CONST
,
13440 (cu
->language
== language_cplus
13441 || cu
->language
== language_java
)
13442 ? &objfile
->global_psymbols
13443 : &objfile
->static_psymbols
,
13444 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
13446 info_ptr
= locate_pdi_sibling (reader
, part_die
, info_ptr
);
13450 /* We'll save this DIE so link it in. */
13451 part_die
->die_parent
= parent_die
;
13452 part_die
->die_sibling
= NULL
;
13453 part_die
->die_child
= NULL
;
13455 if (last_die
&& last_die
== parent_die
)
13456 last_die
->die_child
= part_die
;
13458 last_die
->die_sibling
= part_die
;
13460 last_die
= part_die
;
13462 if (first_die
== NULL
)
13463 first_die
= part_die
;
13465 /* Maybe add the DIE to the hash table. Not all DIEs that we
13466 find interesting need to be in the hash table, because we
13467 also have the parent/sibling/child chains; only those that we
13468 might refer to by offset later during partial symbol reading.
13470 For now this means things that might have be the target of a
13471 DW_AT_specification, DW_AT_abstract_origin, or
13472 DW_AT_extension. DW_AT_extension will refer only to
13473 namespaces; DW_AT_abstract_origin refers to functions (and
13474 many things under the function DIE, but we do not recurse
13475 into function DIEs during partial symbol reading) and
13476 possibly variables as well; DW_AT_specification refers to
13477 declarations. Declarations ought to have the DW_AT_declaration
13478 flag. It happens that GCC forgets to put it in sometimes, but
13479 only for functions, not for types.
13481 Adding more things than necessary to the hash table is harmless
13482 except for the performance cost. Adding too few will result in
13483 wasted time in find_partial_die, when we reread the compilation
13484 unit with load_all_dies set. */
13487 || abbrev
->tag
== DW_TAG_constant
13488 || abbrev
->tag
== DW_TAG_subprogram
13489 || abbrev
->tag
== DW_TAG_variable
13490 || abbrev
->tag
== DW_TAG_namespace
13491 || part_die
->is_declaration
)
13495 slot
= htab_find_slot_with_hash (cu
->partial_dies
, part_die
,
13496 part_die
->offset
.sect_off
, INSERT
);
13500 part_die
= obstack_alloc (&cu
->comp_unit_obstack
,
13501 sizeof (struct partial_die_info
));
13503 /* For some DIEs we want to follow their children (if any). For C
13504 we have no reason to follow the children of structures; for other
13505 languages we have to, so that we can get at method physnames
13506 to infer fully qualified class names, for DW_AT_specification,
13507 and for C++ template arguments. For C++, we also look one level
13508 inside functions to find template arguments (if the name of the
13509 function does not already contain the template arguments).
13511 For Ada, we need to scan the children of subprograms and lexical
13512 blocks as well because Ada allows the definition of nested
13513 entities that could be interesting for the debugger, such as
13514 nested subprograms for instance. */
13515 if (last_die
->has_children
13517 || last_die
->tag
== DW_TAG_namespace
13518 || last_die
->tag
== DW_TAG_module
13519 || last_die
->tag
== DW_TAG_enumeration_type
13520 || (cu
->language
== language_cplus
13521 && last_die
->tag
== DW_TAG_subprogram
13522 && (last_die
->name
== NULL
13523 || strchr (last_die
->name
, '<') == NULL
))
13524 || (cu
->language
!= language_c
13525 && (last_die
->tag
== DW_TAG_class_type
13526 || last_die
->tag
== DW_TAG_interface_type
13527 || last_die
->tag
== DW_TAG_structure_type
13528 || last_die
->tag
== DW_TAG_union_type
))
13529 || (cu
->language
== language_ada
13530 && (last_die
->tag
== DW_TAG_subprogram
13531 || last_die
->tag
== DW_TAG_lexical_block
))))
13534 parent_die
= last_die
;
13538 /* Otherwise we skip to the next sibling, if any. */
13539 info_ptr
= locate_pdi_sibling (reader
, last_die
, info_ptr
);
13541 /* Back to the top, do it again. */
13545 /* Read a minimal amount of information into the minimal die structure. */
13548 read_partial_die (const struct die_reader_specs
*reader
,
13549 struct partial_die_info
*part_die
,
13550 struct abbrev_info
*abbrev
, unsigned int abbrev_len
,
13551 gdb_byte
*info_ptr
)
13553 struct dwarf2_cu
*cu
= reader
->cu
;
13554 struct objfile
*objfile
= cu
->objfile
;
13555 gdb_byte
*buffer
= reader
->buffer
;
13557 struct attribute attr
;
13558 int has_low_pc_attr
= 0;
13559 int has_high_pc_attr
= 0;
13560 int high_pc_relative
= 0;
13562 memset (part_die
, 0, sizeof (struct partial_die_info
));
13564 part_die
->offset
.sect_off
= info_ptr
- buffer
;
13566 info_ptr
+= abbrev_len
;
13568 if (abbrev
== NULL
)
13571 part_die
->tag
= abbrev
->tag
;
13572 part_die
->has_children
= abbrev
->has_children
;
13574 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
13576 info_ptr
= read_attribute (reader
, &attr
, &abbrev
->attrs
[i
], info_ptr
);
13578 /* Store the data if it is of an attribute we want to keep in a
13579 partial symbol table. */
13583 switch (part_die
->tag
)
13585 case DW_TAG_compile_unit
:
13586 case DW_TAG_partial_unit
:
13587 case DW_TAG_type_unit
:
13588 /* Compilation units have a DW_AT_name that is a filename, not
13589 a source language identifier. */
13590 case DW_TAG_enumeration_type
:
13591 case DW_TAG_enumerator
:
13592 /* These tags always have simple identifiers already; no need
13593 to canonicalize them. */
13594 part_die
->name
= DW_STRING (&attr
);
13598 = dwarf2_canonicalize_name (DW_STRING (&attr
), cu
,
13599 &objfile
->objfile_obstack
);
13603 case DW_AT_linkage_name
:
13604 case DW_AT_MIPS_linkage_name
:
13605 /* Note that both forms of linkage name might appear. We
13606 assume they will be the same, and we only store the last
13608 if (cu
->language
== language_ada
)
13609 part_die
->name
= DW_STRING (&attr
);
13610 part_die
->linkage_name
= DW_STRING (&attr
);
13613 has_low_pc_attr
= 1;
13614 part_die
->lowpc
= DW_ADDR (&attr
);
13616 case DW_AT_high_pc
:
13617 has_high_pc_attr
= 1;
13618 if (attr
.form
== DW_FORM_addr
13619 || attr
.form
== DW_FORM_GNU_addr_index
)
13620 part_die
->highpc
= DW_ADDR (&attr
);
13623 high_pc_relative
= 1;
13624 part_die
->highpc
= DW_UNSND (&attr
);
13627 case DW_AT_location
:
13628 /* Support the .debug_loc offsets. */
13629 if (attr_form_is_block (&attr
))
13631 part_die
->d
.locdesc
= DW_BLOCK (&attr
);
13633 else if (attr_form_is_section_offset (&attr
))
13635 dwarf2_complex_location_expr_complaint ();
13639 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
13640 "partial symbol information");
13643 case DW_AT_external
:
13644 part_die
->is_external
= DW_UNSND (&attr
);
13646 case DW_AT_declaration
:
13647 part_die
->is_declaration
= DW_UNSND (&attr
);
13650 part_die
->has_type
= 1;
13652 case DW_AT_abstract_origin
:
13653 case DW_AT_specification
:
13654 case DW_AT_extension
:
13655 part_die
->has_specification
= 1;
13656 part_die
->spec_offset
= dwarf2_get_ref_die_offset (&attr
);
13657 part_die
->spec_is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
13658 || cu
->per_cu
->is_dwz
);
13660 case DW_AT_sibling
:
13661 /* Ignore absolute siblings, they might point outside of
13662 the current compile unit. */
13663 if (attr
.form
== DW_FORM_ref_addr
)
13664 complaint (&symfile_complaints
,
13665 _("ignoring absolute DW_AT_sibling"));
13667 part_die
->sibling
= buffer
+ dwarf2_get_ref_die_offset (&attr
).sect_off
;
13669 case DW_AT_byte_size
:
13670 part_die
->has_byte_size
= 1;
13672 case DW_AT_calling_convention
:
13673 /* DWARF doesn't provide a way to identify a program's source-level
13674 entry point. DW_AT_calling_convention attributes are only meant
13675 to describe functions' calling conventions.
13677 However, because it's a necessary piece of information in
13678 Fortran, and because DW_CC_program is the only piece of debugging
13679 information whose definition refers to a 'main program' at all,
13680 several compilers have begun marking Fortran main programs with
13681 DW_CC_program --- even when those functions use the standard
13682 calling conventions.
13684 So until DWARF specifies a way to provide this information and
13685 compilers pick up the new representation, we'll support this
13687 if (DW_UNSND (&attr
) == DW_CC_program
13688 && cu
->language
== language_fortran
)
13690 set_main_name (part_die
->name
);
13692 /* As this DIE has a static linkage the name would be difficult
13693 to look up later. */
13694 language_of_main
= language_fortran
;
13698 if (DW_UNSND (&attr
) == DW_INL_inlined
13699 || DW_UNSND (&attr
) == DW_INL_declared_inlined
)
13700 part_die
->may_be_inlined
= 1;
13704 if (part_die
->tag
== DW_TAG_imported_unit
)
13706 part_die
->d
.offset
= dwarf2_get_ref_die_offset (&attr
);
13707 part_die
->is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
13708 || cu
->per_cu
->is_dwz
);
13717 if (high_pc_relative
)
13718 part_die
->highpc
+= part_die
->lowpc
;
13720 if (has_low_pc_attr
&& has_high_pc_attr
)
13722 /* When using the GNU linker, .gnu.linkonce. sections are used to
13723 eliminate duplicate copies of functions and vtables and such.
13724 The linker will arbitrarily choose one and discard the others.
13725 The AT_*_pc values for such functions refer to local labels in
13726 these sections. If the section from that file was discarded, the
13727 labels are not in the output, so the relocs get a value of 0.
13728 If this is a discarded function, mark the pc bounds as invalid,
13729 so that GDB will ignore it. */
13730 if (part_die
->lowpc
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
13732 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
13734 complaint (&symfile_complaints
,
13735 _("DW_AT_low_pc %s is zero "
13736 "for DIE at 0x%x [in module %s]"),
13737 paddress (gdbarch
, part_die
->lowpc
),
13738 part_die
->offset
.sect_off
, objfile
->name
);
13740 /* dwarf2_get_pc_bounds has also the strict low < high requirement. */
13741 else if (part_die
->lowpc
>= part_die
->highpc
)
13743 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
13745 complaint (&symfile_complaints
,
13746 _("DW_AT_low_pc %s is not < DW_AT_high_pc %s "
13747 "for DIE at 0x%x [in module %s]"),
13748 paddress (gdbarch
, part_die
->lowpc
),
13749 paddress (gdbarch
, part_die
->highpc
),
13750 part_die
->offset
.sect_off
, objfile
->name
);
13753 part_die
->has_pc_info
= 1;
13759 /* Find a cached partial DIE at OFFSET in CU. */
13761 static struct partial_die_info
*
13762 find_partial_die_in_comp_unit (sect_offset offset
, struct dwarf2_cu
*cu
)
13764 struct partial_die_info
*lookup_die
= NULL
;
13765 struct partial_die_info part_die
;
13767 part_die
.offset
= offset
;
13768 lookup_die
= htab_find_with_hash (cu
->partial_dies
, &part_die
,
13774 /* Find a partial DIE at OFFSET, which may or may not be in CU,
13775 except in the case of .debug_types DIEs which do not reference
13776 outside their CU (they do however referencing other types via
13777 DW_FORM_ref_sig8). */
13779 static struct partial_die_info
*
13780 find_partial_die (sect_offset offset
, int offset_in_dwz
, struct dwarf2_cu
*cu
)
13782 struct objfile
*objfile
= cu
->objfile
;
13783 struct dwarf2_per_cu_data
*per_cu
= NULL
;
13784 struct partial_die_info
*pd
= NULL
;
13786 if (offset_in_dwz
== cu
->per_cu
->is_dwz
13787 && offset_in_cu_p (&cu
->header
, offset
))
13789 pd
= find_partial_die_in_comp_unit (offset
, cu
);
13792 /* We missed recording what we needed.
13793 Load all dies and try again. */
13794 per_cu
= cu
->per_cu
;
13798 /* TUs don't reference other CUs/TUs (except via type signatures). */
13799 if (cu
->per_cu
->is_debug_types
)
13801 error (_("Dwarf Error: Type Unit at offset 0x%lx contains"
13802 " external reference to offset 0x%lx [in module %s].\n"),
13803 (long) cu
->header
.offset
.sect_off
, (long) offset
.sect_off
,
13804 bfd_get_filename (objfile
->obfd
));
13806 per_cu
= dwarf2_find_containing_comp_unit (offset
, offset_in_dwz
,
13809 if (per_cu
->cu
== NULL
|| per_cu
->cu
->partial_dies
== NULL
)
13810 load_partial_comp_unit (per_cu
);
13812 per_cu
->cu
->last_used
= 0;
13813 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
13816 /* If we didn't find it, and not all dies have been loaded,
13817 load them all and try again. */
13819 if (pd
== NULL
&& per_cu
->load_all_dies
== 0)
13821 per_cu
->load_all_dies
= 1;
13823 /* This is nasty. When we reread the DIEs, somewhere up the call chain
13824 THIS_CU->cu may already be in use. So we can't just free it and
13825 replace its DIEs with the ones we read in. Instead, we leave those
13826 DIEs alone (which can still be in use, e.g. in scan_partial_symbols),
13827 and clobber THIS_CU->cu->partial_dies with the hash table for the new
13829 load_partial_comp_unit (per_cu
);
13831 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
13835 internal_error (__FILE__
, __LINE__
,
13836 _("could not find partial DIE 0x%x "
13837 "in cache [from module %s]\n"),
13838 offset
.sect_off
, bfd_get_filename (objfile
->obfd
));
13842 /* See if we can figure out if the class lives in a namespace. We do
13843 this by looking for a member function; its demangled name will
13844 contain namespace info, if there is any. */
13847 guess_partial_die_structure_name (struct partial_die_info
*struct_pdi
,
13848 struct dwarf2_cu
*cu
)
13850 /* NOTE: carlton/2003-10-07: Getting the info this way changes
13851 what template types look like, because the demangler
13852 frequently doesn't give the same name as the debug info. We
13853 could fix this by only using the demangled name to get the
13854 prefix (but see comment in read_structure_type). */
13856 struct partial_die_info
*real_pdi
;
13857 struct partial_die_info
*child_pdi
;
13859 /* If this DIE (this DIE's specification, if any) has a parent, then
13860 we should not do this. We'll prepend the parent's fully qualified
13861 name when we create the partial symbol. */
13863 real_pdi
= struct_pdi
;
13864 while (real_pdi
->has_specification
)
13865 real_pdi
= find_partial_die (real_pdi
->spec_offset
,
13866 real_pdi
->spec_is_dwz
, cu
);
13868 if (real_pdi
->die_parent
!= NULL
)
13871 for (child_pdi
= struct_pdi
->die_child
;
13873 child_pdi
= child_pdi
->die_sibling
)
13875 if (child_pdi
->tag
== DW_TAG_subprogram
13876 && child_pdi
->linkage_name
!= NULL
)
13878 char *actual_class_name
13879 = language_class_name_from_physname (cu
->language_defn
,
13880 child_pdi
->linkage_name
);
13881 if (actual_class_name
!= NULL
)
13884 = obstack_copy0 (&cu
->objfile
->objfile_obstack
,
13886 strlen (actual_class_name
));
13887 xfree (actual_class_name
);
13894 /* Adjust PART_DIE before generating a symbol for it. This function
13895 may set the is_external flag or change the DIE's name. */
13898 fixup_partial_die (struct partial_die_info
*part_die
,
13899 struct dwarf2_cu
*cu
)
13901 /* Once we've fixed up a die, there's no point in doing so again.
13902 This also avoids a memory leak if we were to call
13903 guess_partial_die_structure_name multiple times. */
13904 if (part_die
->fixup_called
)
13907 /* If we found a reference attribute and the DIE has no name, try
13908 to find a name in the referred to DIE. */
13910 if (part_die
->name
== NULL
&& part_die
->has_specification
)
13912 struct partial_die_info
*spec_die
;
13914 spec_die
= find_partial_die (part_die
->spec_offset
,
13915 part_die
->spec_is_dwz
, cu
);
13917 fixup_partial_die (spec_die
, cu
);
13919 if (spec_die
->name
)
13921 part_die
->name
= spec_die
->name
;
13923 /* Copy DW_AT_external attribute if it is set. */
13924 if (spec_die
->is_external
)
13925 part_die
->is_external
= spec_die
->is_external
;
13929 /* Set default names for some unnamed DIEs. */
13931 if (part_die
->name
== NULL
&& part_die
->tag
== DW_TAG_namespace
)
13932 part_die
->name
= CP_ANONYMOUS_NAMESPACE_STR
;
13934 /* If there is no parent die to provide a namespace, and there are
13935 children, see if we can determine the namespace from their linkage
13937 if (cu
->language
== language_cplus
13938 && !VEC_empty (dwarf2_section_info_def
, dwarf2_per_objfile
->types
)
13939 && part_die
->die_parent
== NULL
13940 && part_die
->has_children
13941 && (part_die
->tag
== DW_TAG_class_type
13942 || part_die
->tag
== DW_TAG_structure_type
13943 || part_die
->tag
== DW_TAG_union_type
))
13944 guess_partial_die_structure_name (part_die
, cu
);
13946 /* GCC might emit a nameless struct or union that has a linkage
13947 name. See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
13948 if (part_die
->name
== NULL
13949 && (part_die
->tag
== DW_TAG_class_type
13950 || part_die
->tag
== DW_TAG_interface_type
13951 || part_die
->tag
== DW_TAG_structure_type
13952 || part_die
->tag
== DW_TAG_union_type
)
13953 && part_die
->linkage_name
!= NULL
)
13957 demangled
= cplus_demangle (part_die
->linkage_name
, DMGL_TYPES
);
13962 /* Strip any leading namespaces/classes, keep only the base name.
13963 DW_AT_name for named DIEs does not contain the prefixes. */
13964 base
= strrchr (demangled
, ':');
13965 if (base
&& base
> demangled
&& base
[-1] == ':')
13970 part_die
->name
= obstack_copy0 (&cu
->objfile
->objfile_obstack
,
13971 base
, strlen (base
));
13976 part_die
->fixup_called
= 1;
13979 /* Read an attribute value described by an attribute form. */
13982 read_attribute_value (const struct die_reader_specs
*reader
,
13983 struct attribute
*attr
, unsigned form
,
13984 gdb_byte
*info_ptr
)
13986 struct dwarf2_cu
*cu
= reader
->cu
;
13987 bfd
*abfd
= reader
->abfd
;
13988 struct comp_unit_head
*cu_header
= &cu
->header
;
13989 unsigned int bytes_read
;
13990 struct dwarf_block
*blk
;
13995 case DW_FORM_ref_addr
:
13996 if (cu
->header
.version
== 2)
13997 DW_UNSND (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
13999 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
,
14000 &cu
->header
, &bytes_read
);
14001 info_ptr
+= bytes_read
;
14003 case DW_FORM_GNU_ref_alt
:
14004 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
14005 info_ptr
+= bytes_read
;
14008 DW_ADDR (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
14009 info_ptr
+= bytes_read
;
14011 case DW_FORM_block2
:
14012 blk
= dwarf_alloc_block (cu
);
14013 blk
->size
= read_2_bytes (abfd
, info_ptr
);
14015 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
14016 info_ptr
+= blk
->size
;
14017 DW_BLOCK (attr
) = blk
;
14019 case DW_FORM_block4
:
14020 blk
= dwarf_alloc_block (cu
);
14021 blk
->size
= read_4_bytes (abfd
, info_ptr
);
14023 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
14024 info_ptr
+= blk
->size
;
14025 DW_BLOCK (attr
) = blk
;
14027 case DW_FORM_data2
:
14028 DW_UNSND (attr
) = read_2_bytes (abfd
, info_ptr
);
14031 case DW_FORM_data4
:
14032 DW_UNSND (attr
) = read_4_bytes (abfd
, info_ptr
);
14035 case DW_FORM_data8
:
14036 DW_UNSND (attr
) = read_8_bytes (abfd
, info_ptr
);
14039 case DW_FORM_sec_offset
:
14040 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
14041 info_ptr
+= bytes_read
;
14043 case DW_FORM_string
:
14044 DW_STRING (attr
) = read_direct_string (abfd
, info_ptr
, &bytes_read
);
14045 DW_STRING_IS_CANONICAL (attr
) = 0;
14046 info_ptr
+= bytes_read
;
14049 if (!cu
->per_cu
->is_dwz
)
14051 DW_STRING (attr
) = read_indirect_string (abfd
, info_ptr
, cu_header
,
14053 DW_STRING_IS_CANONICAL (attr
) = 0;
14054 info_ptr
+= bytes_read
;
14058 case DW_FORM_GNU_strp_alt
:
14060 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
14061 LONGEST str_offset
= read_offset (abfd
, info_ptr
, cu_header
,
14064 DW_STRING (attr
) = read_indirect_string_from_dwz (dwz
, str_offset
);
14065 DW_STRING_IS_CANONICAL (attr
) = 0;
14066 info_ptr
+= bytes_read
;
14069 case DW_FORM_exprloc
:
14070 case DW_FORM_block
:
14071 blk
= dwarf_alloc_block (cu
);
14072 blk
->size
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
14073 info_ptr
+= bytes_read
;
14074 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
14075 info_ptr
+= blk
->size
;
14076 DW_BLOCK (attr
) = blk
;
14078 case DW_FORM_block1
:
14079 blk
= dwarf_alloc_block (cu
);
14080 blk
->size
= read_1_byte (abfd
, info_ptr
);
14082 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
14083 info_ptr
+= blk
->size
;
14084 DW_BLOCK (attr
) = blk
;
14086 case DW_FORM_data1
:
14087 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
14091 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
14094 case DW_FORM_flag_present
:
14095 DW_UNSND (attr
) = 1;
14097 case DW_FORM_sdata
:
14098 DW_SND (attr
) = read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
14099 info_ptr
+= bytes_read
;
14101 case DW_FORM_udata
:
14102 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
14103 info_ptr
+= bytes_read
;
14106 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
14107 + read_1_byte (abfd
, info_ptr
));
14111 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
14112 + read_2_bytes (abfd
, info_ptr
));
14116 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
14117 + read_4_bytes (abfd
, info_ptr
));
14121 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
14122 + read_8_bytes (abfd
, info_ptr
));
14125 case DW_FORM_ref_sig8
:
14126 /* Convert the signature to something we can record in DW_UNSND
14128 NOTE: This is NULL if the type wasn't found. */
14129 DW_SIGNATURED_TYPE (attr
) =
14130 lookup_signatured_type (read_8_bytes (abfd
, info_ptr
));
14133 case DW_FORM_ref_udata
:
14134 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
14135 + read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
));
14136 info_ptr
+= bytes_read
;
14138 case DW_FORM_indirect
:
14139 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
14140 info_ptr
+= bytes_read
;
14141 info_ptr
= read_attribute_value (reader
, attr
, form
, info_ptr
);
14143 case DW_FORM_GNU_addr_index
:
14144 if (reader
->dwo_file
== NULL
)
14146 /* For now flag a hard error.
14147 Later we can turn this into a complaint. */
14148 error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"),
14149 dwarf_form_name (form
),
14150 bfd_get_filename (abfd
));
14152 DW_ADDR (attr
) = read_addr_index_from_leb128 (cu
, info_ptr
, &bytes_read
);
14153 info_ptr
+= bytes_read
;
14155 case DW_FORM_GNU_str_index
:
14156 if (reader
->dwo_file
== NULL
)
14158 /* For now flag a hard error.
14159 Later we can turn this into a complaint if warranted. */
14160 error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"),
14161 dwarf_form_name (form
),
14162 bfd_get_filename (abfd
));
14165 ULONGEST str_index
=
14166 read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
14168 DW_STRING (attr
) = read_str_index (reader
, cu
, str_index
);
14169 DW_STRING_IS_CANONICAL (attr
) = 0;
14170 info_ptr
+= bytes_read
;
14174 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
14175 dwarf_form_name (form
),
14176 bfd_get_filename (abfd
));
14180 if (cu
->per_cu
->is_dwz
&& is_ref_attr (attr
))
14181 attr
->form
= DW_FORM_GNU_ref_alt
;
14183 /* We have seen instances where the compiler tried to emit a byte
14184 size attribute of -1 which ended up being encoded as an unsigned
14185 0xffffffff. Although 0xffffffff is technically a valid size value,
14186 an object of this size seems pretty unlikely so we can relatively
14187 safely treat these cases as if the size attribute was invalid and
14188 treat them as zero by default. */
14189 if (attr
->name
== DW_AT_byte_size
14190 && form
== DW_FORM_data4
14191 && DW_UNSND (attr
) >= 0xffffffff)
14194 (&symfile_complaints
,
14195 _("Suspicious DW_AT_byte_size value treated as zero instead of %s"),
14196 hex_string (DW_UNSND (attr
)));
14197 DW_UNSND (attr
) = 0;
14203 /* Read an attribute described by an abbreviated attribute. */
14206 read_attribute (const struct die_reader_specs
*reader
,
14207 struct attribute
*attr
, struct attr_abbrev
*abbrev
,
14208 gdb_byte
*info_ptr
)
14210 attr
->name
= abbrev
->name
;
14211 return read_attribute_value (reader
, attr
, abbrev
->form
, info_ptr
);
14214 /* Read dwarf information from a buffer. */
14216 static unsigned int
14217 read_1_byte (bfd
*abfd
, const gdb_byte
*buf
)
14219 return bfd_get_8 (abfd
, buf
);
14223 read_1_signed_byte (bfd
*abfd
, const gdb_byte
*buf
)
14225 return bfd_get_signed_8 (abfd
, buf
);
14228 static unsigned int
14229 read_2_bytes (bfd
*abfd
, const gdb_byte
*buf
)
14231 return bfd_get_16 (abfd
, buf
);
14235 read_2_signed_bytes (bfd
*abfd
, const gdb_byte
*buf
)
14237 return bfd_get_signed_16 (abfd
, buf
);
14240 static unsigned int
14241 read_4_bytes (bfd
*abfd
, const gdb_byte
*buf
)
14243 return bfd_get_32 (abfd
, buf
);
14247 read_4_signed_bytes (bfd
*abfd
, const gdb_byte
*buf
)
14249 return bfd_get_signed_32 (abfd
, buf
);
14253 read_8_bytes (bfd
*abfd
, const gdb_byte
*buf
)
14255 return bfd_get_64 (abfd
, buf
);
14259 read_address (bfd
*abfd
, gdb_byte
*buf
, struct dwarf2_cu
*cu
,
14260 unsigned int *bytes_read
)
14262 struct comp_unit_head
*cu_header
= &cu
->header
;
14263 CORE_ADDR retval
= 0;
14265 if (cu_header
->signed_addr_p
)
14267 switch (cu_header
->addr_size
)
14270 retval
= bfd_get_signed_16 (abfd
, buf
);
14273 retval
= bfd_get_signed_32 (abfd
, buf
);
14276 retval
= bfd_get_signed_64 (abfd
, buf
);
14279 internal_error (__FILE__
, __LINE__
,
14280 _("read_address: bad switch, signed [in module %s]"),
14281 bfd_get_filename (abfd
));
14286 switch (cu_header
->addr_size
)
14289 retval
= bfd_get_16 (abfd
, buf
);
14292 retval
= bfd_get_32 (abfd
, buf
);
14295 retval
= bfd_get_64 (abfd
, buf
);
14298 internal_error (__FILE__
, __LINE__
,
14299 _("read_address: bad switch, "
14300 "unsigned [in module %s]"),
14301 bfd_get_filename (abfd
));
14305 *bytes_read
= cu_header
->addr_size
;
14309 /* Read the initial length from a section. The (draft) DWARF 3
14310 specification allows the initial length to take up either 4 bytes
14311 or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8
14312 bytes describe the length and all offsets will be 8 bytes in length
14315 An older, non-standard 64-bit format is also handled by this
14316 function. The older format in question stores the initial length
14317 as an 8-byte quantity without an escape value. Lengths greater
14318 than 2^32 aren't very common which means that the initial 4 bytes
14319 is almost always zero. Since a length value of zero doesn't make
14320 sense for the 32-bit format, this initial zero can be considered to
14321 be an escape value which indicates the presence of the older 64-bit
14322 format. As written, the code can't detect (old format) lengths
14323 greater than 4GB. If it becomes necessary to handle lengths
14324 somewhat larger than 4GB, we could allow other small values (such
14325 as the non-sensical values of 1, 2, and 3) to also be used as
14326 escape values indicating the presence of the old format.
14328 The value returned via bytes_read should be used to increment the
14329 relevant pointer after calling read_initial_length().
14331 [ Note: read_initial_length() and read_offset() are based on the
14332 document entitled "DWARF Debugging Information Format", revision
14333 3, draft 8, dated November 19, 2001. This document was obtained
14336 http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf
14338 This document is only a draft and is subject to change. (So beware.)
14340 Details regarding the older, non-standard 64-bit format were
14341 determined empirically by examining 64-bit ELF files produced by
14342 the SGI toolchain on an IRIX 6.5 machine.
14344 - Kevin, July 16, 2002
14348 read_initial_length (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read
)
14350 LONGEST length
= bfd_get_32 (abfd
, buf
);
14352 if (length
== 0xffffffff)
14354 length
= bfd_get_64 (abfd
, buf
+ 4);
14357 else if (length
== 0)
14359 /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */
14360 length
= bfd_get_64 (abfd
, buf
);
14371 /* Cover function for read_initial_length.
14372 Returns the length of the object at BUF, and stores the size of the
14373 initial length in *BYTES_READ and stores the size that offsets will be in
14375 If the initial length size is not equivalent to that specified in
14376 CU_HEADER then issue a complaint.
14377 This is useful when reading non-comp-unit headers. */
14380 read_checked_initial_length_and_offset (bfd
*abfd
, gdb_byte
*buf
,
14381 const struct comp_unit_head
*cu_header
,
14382 unsigned int *bytes_read
,
14383 unsigned int *offset_size
)
14385 LONGEST length
= read_initial_length (abfd
, buf
, bytes_read
);
14387 gdb_assert (cu_header
->initial_length_size
== 4
14388 || cu_header
->initial_length_size
== 8
14389 || cu_header
->initial_length_size
== 12);
14391 if (cu_header
->initial_length_size
!= *bytes_read
)
14392 complaint (&symfile_complaints
,
14393 _("intermixed 32-bit and 64-bit DWARF sections"));
14395 *offset_size
= (*bytes_read
== 4) ? 4 : 8;
14399 /* Read an offset from the data stream. The size of the offset is
14400 given by cu_header->offset_size. */
14403 read_offset (bfd
*abfd
, gdb_byte
*buf
, const struct comp_unit_head
*cu_header
,
14404 unsigned int *bytes_read
)
14406 LONGEST offset
= read_offset_1 (abfd
, buf
, cu_header
->offset_size
);
14408 *bytes_read
= cu_header
->offset_size
;
14412 /* Read an offset from the data stream. */
14415 read_offset_1 (bfd
*abfd
, gdb_byte
*buf
, unsigned int offset_size
)
14417 LONGEST retval
= 0;
14419 switch (offset_size
)
14422 retval
= bfd_get_32 (abfd
, buf
);
14425 retval
= bfd_get_64 (abfd
, buf
);
14428 internal_error (__FILE__
, __LINE__
,
14429 _("read_offset_1: bad switch [in module %s]"),
14430 bfd_get_filename (abfd
));
14437 read_n_bytes (bfd
*abfd
, gdb_byte
*buf
, unsigned int size
)
14439 /* If the size of a host char is 8 bits, we can return a pointer
14440 to the buffer, otherwise we have to copy the data to a buffer
14441 allocated on the temporary obstack. */
14442 gdb_assert (HOST_CHAR_BIT
== 8);
14447 read_direct_string (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
14449 /* If the size of a host char is 8 bits, we can return a pointer
14450 to the string, otherwise we have to copy the string to a buffer
14451 allocated on the temporary obstack. */
14452 gdb_assert (HOST_CHAR_BIT
== 8);
14455 *bytes_read_ptr
= 1;
14458 *bytes_read_ptr
= strlen ((char *) buf
) + 1;
14459 return (char *) buf
;
14463 read_indirect_string_at_offset (bfd
*abfd
, LONGEST str_offset
)
14465 dwarf2_read_section (dwarf2_per_objfile
->objfile
, &dwarf2_per_objfile
->str
);
14466 if (dwarf2_per_objfile
->str
.buffer
== NULL
)
14467 error (_("DW_FORM_strp used without .debug_str section [in module %s]"),
14468 bfd_get_filename (abfd
));
14469 if (str_offset
>= dwarf2_per_objfile
->str
.size
)
14470 error (_("DW_FORM_strp pointing outside of "
14471 ".debug_str section [in module %s]"),
14472 bfd_get_filename (abfd
));
14473 gdb_assert (HOST_CHAR_BIT
== 8);
14474 if (dwarf2_per_objfile
->str
.buffer
[str_offset
] == '\0')
14476 return (char *) (dwarf2_per_objfile
->str
.buffer
+ str_offset
);
14479 /* Read a string at offset STR_OFFSET in the .debug_str section from
14480 the .dwz file DWZ. Throw an error if the offset is too large. If
14481 the string consists of a single NUL byte, return NULL; otherwise
14482 return a pointer to the string. */
14485 read_indirect_string_from_dwz (struct dwz_file
*dwz
, LONGEST str_offset
)
14487 dwarf2_read_section (dwarf2_per_objfile
->objfile
, &dwz
->str
);
14489 if (dwz
->str
.buffer
== NULL
)
14490 error (_("DW_FORM_GNU_strp_alt used without .debug_str "
14491 "section [in module %s]"),
14492 bfd_get_filename (dwz
->dwz_bfd
));
14493 if (str_offset
>= dwz
->str
.size
)
14494 error (_("DW_FORM_GNU_strp_alt pointing outside of "
14495 ".debug_str section [in module %s]"),
14496 bfd_get_filename (dwz
->dwz_bfd
));
14497 gdb_assert (HOST_CHAR_BIT
== 8);
14498 if (dwz
->str
.buffer
[str_offset
] == '\0')
14500 return (char *) (dwz
->str
.buffer
+ str_offset
);
14504 read_indirect_string (bfd
*abfd
, gdb_byte
*buf
,
14505 const struct comp_unit_head
*cu_header
,
14506 unsigned int *bytes_read_ptr
)
14508 LONGEST str_offset
= read_offset (abfd
, buf
, cu_header
, bytes_read_ptr
);
14510 return read_indirect_string_at_offset (abfd
, str_offset
);
14514 read_unsigned_leb128 (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
14517 unsigned int num_read
;
14519 unsigned char byte
;
14527 byte
= bfd_get_8 (abfd
, buf
);
14530 result
|= ((ULONGEST
) (byte
& 127) << shift
);
14531 if ((byte
& 128) == 0)
14537 *bytes_read_ptr
= num_read
;
14542 read_signed_leb128 (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
14545 int i
, shift
, num_read
;
14546 unsigned char byte
;
14554 byte
= bfd_get_8 (abfd
, buf
);
14557 result
|= ((LONGEST
) (byte
& 127) << shift
);
14559 if ((byte
& 128) == 0)
14564 if ((shift
< 8 * sizeof (result
)) && (byte
& 0x40))
14565 result
|= -(((LONGEST
) 1) << shift
);
14566 *bytes_read_ptr
= num_read
;
14570 /* Given index ADDR_INDEX in .debug_addr, fetch the value.
14571 ADDR_BASE is the DW_AT_GNU_addr_base attribute or zero.
14572 ADDR_SIZE is the size of addresses from the CU header. */
14575 read_addr_index_1 (unsigned int addr_index
, ULONGEST addr_base
, int addr_size
)
14577 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
14578 bfd
*abfd
= objfile
->obfd
;
14579 const gdb_byte
*info_ptr
;
14581 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->addr
);
14582 if (dwarf2_per_objfile
->addr
.buffer
== NULL
)
14583 error (_("DW_FORM_addr_index used without .debug_addr section [in module %s]"),
14585 if (addr_base
+ addr_index
* addr_size
>= dwarf2_per_objfile
->addr
.size
)
14586 error (_("DW_FORM_addr_index pointing outside of "
14587 ".debug_addr section [in module %s]"),
14589 info_ptr
= (dwarf2_per_objfile
->addr
.buffer
14590 + addr_base
+ addr_index
* addr_size
);
14591 if (addr_size
== 4)
14592 return bfd_get_32 (abfd
, info_ptr
);
14594 return bfd_get_64 (abfd
, info_ptr
);
14597 /* Given index ADDR_INDEX in .debug_addr, fetch the value. */
14600 read_addr_index (struct dwarf2_cu
*cu
, unsigned int addr_index
)
14602 return read_addr_index_1 (addr_index
, cu
->addr_base
, cu
->header
.addr_size
);
14605 /* Given a pointer to an leb128 value, fetch the value from .debug_addr. */
14608 read_addr_index_from_leb128 (struct dwarf2_cu
*cu
, gdb_byte
*info_ptr
,
14609 unsigned int *bytes_read
)
14611 bfd
*abfd
= cu
->objfile
->obfd
;
14612 unsigned int addr_index
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
14614 return read_addr_index (cu
, addr_index
);
14617 /* Data structure to pass results from dwarf2_read_addr_index_reader
14618 back to dwarf2_read_addr_index. */
14620 struct dwarf2_read_addr_index_data
14622 ULONGEST addr_base
;
14626 /* die_reader_func for dwarf2_read_addr_index. */
14629 dwarf2_read_addr_index_reader (const struct die_reader_specs
*reader
,
14630 gdb_byte
*info_ptr
,
14631 struct die_info
*comp_unit_die
,
14635 struct dwarf2_cu
*cu
= reader
->cu
;
14636 struct dwarf2_read_addr_index_data
*aidata
=
14637 (struct dwarf2_read_addr_index_data
*) data
;
14639 aidata
->addr_base
= cu
->addr_base
;
14640 aidata
->addr_size
= cu
->header
.addr_size
;
14643 /* Given an index in .debug_addr, fetch the value.
14644 NOTE: This can be called during dwarf expression evaluation,
14645 long after the debug information has been read, and thus per_cu->cu
14646 may no longer exist. */
14649 dwarf2_read_addr_index (struct dwarf2_per_cu_data
*per_cu
,
14650 unsigned int addr_index
)
14652 struct objfile
*objfile
= per_cu
->objfile
;
14653 struct dwarf2_cu
*cu
= per_cu
->cu
;
14654 ULONGEST addr_base
;
14657 /* This is intended to be called from outside this file. */
14658 dw2_setup (objfile
);
14660 /* We need addr_base and addr_size.
14661 If we don't have PER_CU->cu, we have to get it.
14662 Nasty, but the alternative is storing the needed info in PER_CU,
14663 which at this point doesn't seem justified: it's not clear how frequently
14664 it would get used and it would increase the size of every PER_CU.
14665 Entry points like dwarf2_per_cu_addr_size do a similar thing
14666 so we're not in uncharted territory here.
14667 Alas we need to be a bit more complicated as addr_base is contained
14670 We don't need to read the entire CU(/TU).
14671 We just need the header and top level die.
14673 IWBN to use the aging mechanism to let us lazily later discard the CU.
14674 For now we skip this optimization. */
14678 addr_base
= cu
->addr_base
;
14679 addr_size
= cu
->header
.addr_size
;
14683 struct dwarf2_read_addr_index_data aidata
;
14685 /* Note: We can't use init_cutu_and_read_dies_simple here,
14686 we need addr_base. */
14687 init_cutu_and_read_dies (per_cu
, NULL
, 0, 0,
14688 dwarf2_read_addr_index_reader
, &aidata
);
14689 addr_base
= aidata
.addr_base
;
14690 addr_size
= aidata
.addr_size
;
14693 return read_addr_index_1 (addr_index
, addr_base
, addr_size
);
14696 /* Given a DW_AT_str_index, fetch the string. */
14699 read_str_index (const struct die_reader_specs
*reader
,
14700 struct dwarf2_cu
*cu
, ULONGEST str_index
)
14702 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
14703 const char *dwo_name
= objfile
->name
;
14704 bfd
*abfd
= objfile
->obfd
;
14705 struct dwo_sections
*sections
= &reader
->dwo_file
->sections
;
14706 gdb_byte
*info_ptr
;
14707 ULONGEST str_offset
;
14709 dwarf2_read_section (objfile
, §ions
->str
);
14710 dwarf2_read_section (objfile
, §ions
->str_offsets
);
14711 if (sections
->str
.buffer
== NULL
)
14712 error (_("DW_FORM_str_index used without .debug_str.dwo section"
14713 " in CU at offset 0x%lx [in module %s]"),
14714 (long) cu
->header
.offset
.sect_off
, dwo_name
);
14715 if (sections
->str_offsets
.buffer
== NULL
)
14716 error (_("DW_FORM_str_index used without .debug_str_offsets.dwo section"
14717 " in CU at offset 0x%lx [in module %s]"),
14718 (long) cu
->header
.offset
.sect_off
, dwo_name
);
14719 if (str_index
* cu
->header
.offset_size
>= sections
->str_offsets
.size
)
14720 error (_("DW_FORM_str_index pointing outside of .debug_str_offsets.dwo"
14721 " section in CU at offset 0x%lx [in module %s]"),
14722 (long) cu
->header
.offset
.sect_off
, dwo_name
);
14723 info_ptr
= (sections
->str_offsets
.buffer
14724 + str_index
* cu
->header
.offset_size
);
14725 if (cu
->header
.offset_size
== 4)
14726 str_offset
= bfd_get_32 (abfd
, info_ptr
);
14728 str_offset
= bfd_get_64 (abfd
, info_ptr
);
14729 if (str_offset
>= sections
->str
.size
)
14730 error (_("Offset from DW_FORM_str_index pointing outside of"
14731 " .debug_str.dwo section in CU at offset 0x%lx [in module %s]"),
14732 (long) cu
->header
.offset
.sect_off
, dwo_name
);
14733 return (char *) (sections
->str
.buffer
+ str_offset
);
14736 /* Return the length of an LEB128 number in BUF. */
14739 leb128_size (const gdb_byte
*buf
)
14741 const gdb_byte
*begin
= buf
;
14747 if ((byte
& 128) == 0)
14748 return buf
- begin
;
14753 set_cu_language (unsigned int lang
, struct dwarf2_cu
*cu
)
14760 cu
->language
= language_c
;
14762 case DW_LANG_C_plus_plus
:
14763 cu
->language
= language_cplus
;
14766 cu
->language
= language_d
;
14768 case DW_LANG_Fortran77
:
14769 case DW_LANG_Fortran90
:
14770 case DW_LANG_Fortran95
:
14771 cu
->language
= language_fortran
;
14774 cu
->language
= language_go
;
14776 case DW_LANG_Mips_Assembler
:
14777 cu
->language
= language_asm
;
14780 cu
->language
= language_java
;
14782 case DW_LANG_Ada83
:
14783 case DW_LANG_Ada95
:
14784 cu
->language
= language_ada
;
14786 case DW_LANG_Modula2
:
14787 cu
->language
= language_m2
;
14789 case DW_LANG_Pascal83
:
14790 cu
->language
= language_pascal
;
14793 cu
->language
= language_objc
;
14795 case DW_LANG_Cobol74
:
14796 case DW_LANG_Cobol85
:
14798 cu
->language
= language_minimal
;
14801 cu
->language_defn
= language_def (cu
->language
);
14804 /* Return the named attribute or NULL if not there. */
14806 static struct attribute
*
14807 dwarf2_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
14812 struct attribute
*spec
= NULL
;
14814 for (i
= 0; i
< die
->num_attrs
; ++i
)
14816 if (die
->attrs
[i
].name
== name
)
14817 return &die
->attrs
[i
];
14818 if (die
->attrs
[i
].name
== DW_AT_specification
14819 || die
->attrs
[i
].name
== DW_AT_abstract_origin
)
14820 spec
= &die
->attrs
[i
];
14826 die
= follow_die_ref (die
, spec
, &cu
);
14832 /* Return the named attribute or NULL if not there,
14833 but do not follow DW_AT_specification, etc.
14834 This is for use in contexts where we're reading .debug_types dies.
14835 Following DW_AT_specification, DW_AT_abstract_origin will take us
14836 back up the chain, and we want to go down. */
14838 static struct attribute
*
14839 dwarf2_attr_no_follow (struct die_info
*die
, unsigned int name
)
14843 for (i
= 0; i
< die
->num_attrs
; ++i
)
14844 if (die
->attrs
[i
].name
== name
)
14845 return &die
->attrs
[i
];
14850 /* Return non-zero iff the attribute NAME is defined for the given DIE,
14851 and holds a non-zero value. This function should only be used for
14852 DW_FORM_flag or DW_FORM_flag_present attributes. */
14855 dwarf2_flag_true_p (struct die_info
*die
, unsigned name
, struct dwarf2_cu
*cu
)
14857 struct attribute
*attr
= dwarf2_attr (die
, name
, cu
);
14859 return (attr
&& DW_UNSND (attr
));
14863 die_is_declaration (struct die_info
*die
, struct dwarf2_cu
*cu
)
14865 /* A DIE is a declaration if it has a DW_AT_declaration attribute
14866 which value is non-zero. However, we have to be careful with
14867 DIEs having a DW_AT_specification attribute, because dwarf2_attr()
14868 (via dwarf2_flag_true_p) follows this attribute. So we may
14869 end up accidently finding a declaration attribute that belongs
14870 to a different DIE referenced by the specification attribute,
14871 even though the given DIE does not have a declaration attribute. */
14872 return (dwarf2_flag_true_p (die
, DW_AT_declaration
, cu
)
14873 && dwarf2_attr (die
, DW_AT_specification
, cu
) == NULL
);
14876 /* Return the die giving the specification for DIE, if there is
14877 one. *SPEC_CU is the CU containing DIE on input, and the CU
14878 containing the return value on output. If there is no
14879 specification, but there is an abstract origin, that is
14882 static struct die_info
*
14883 die_specification (struct die_info
*die
, struct dwarf2_cu
**spec_cu
)
14885 struct attribute
*spec_attr
= dwarf2_attr (die
, DW_AT_specification
,
14888 if (spec_attr
== NULL
)
14889 spec_attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, *spec_cu
);
14891 if (spec_attr
== NULL
)
14894 return follow_die_ref (die
, spec_attr
, spec_cu
);
14897 /* Free the line_header structure *LH, and any arrays and strings it
14899 NOTE: This is also used as a "cleanup" function. */
14902 free_line_header (struct line_header
*lh
)
14904 if (lh
->standard_opcode_lengths
)
14905 xfree (lh
->standard_opcode_lengths
);
14907 /* Remember that all the lh->file_names[i].name pointers are
14908 pointers into debug_line_buffer, and don't need to be freed. */
14909 if (lh
->file_names
)
14910 xfree (lh
->file_names
);
14912 /* Similarly for the include directory names. */
14913 if (lh
->include_dirs
)
14914 xfree (lh
->include_dirs
);
14919 /* Add an entry to LH's include directory table. */
14922 add_include_dir (struct line_header
*lh
, char *include_dir
)
14924 /* Grow the array if necessary. */
14925 if (lh
->include_dirs_size
== 0)
14927 lh
->include_dirs_size
= 1; /* for testing */
14928 lh
->include_dirs
= xmalloc (lh
->include_dirs_size
14929 * sizeof (*lh
->include_dirs
));
14931 else if (lh
->num_include_dirs
>= lh
->include_dirs_size
)
14933 lh
->include_dirs_size
*= 2;
14934 lh
->include_dirs
= xrealloc (lh
->include_dirs
,
14935 (lh
->include_dirs_size
14936 * sizeof (*lh
->include_dirs
)));
14939 lh
->include_dirs
[lh
->num_include_dirs
++] = include_dir
;
14942 /* Add an entry to LH's file name table. */
14945 add_file_name (struct line_header
*lh
,
14947 unsigned int dir_index
,
14948 unsigned int mod_time
,
14949 unsigned int length
)
14951 struct file_entry
*fe
;
14953 /* Grow the array if necessary. */
14954 if (lh
->file_names_size
== 0)
14956 lh
->file_names_size
= 1; /* for testing */
14957 lh
->file_names
= xmalloc (lh
->file_names_size
14958 * sizeof (*lh
->file_names
));
14960 else if (lh
->num_file_names
>= lh
->file_names_size
)
14962 lh
->file_names_size
*= 2;
14963 lh
->file_names
= xrealloc (lh
->file_names
,
14964 (lh
->file_names_size
14965 * sizeof (*lh
->file_names
)));
14968 fe
= &lh
->file_names
[lh
->num_file_names
++];
14970 fe
->dir_index
= dir_index
;
14971 fe
->mod_time
= mod_time
;
14972 fe
->length
= length
;
14973 fe
->included_p
= 0;
14977 /* A convenience function to find the proper .debug_line section for a
14980 static struct dwarf2_section_info
*
14981 get_debug_line_section (struct dwarf2_cu
*cu
)
14983 struct dwarf2_section_info
*section
;
14985 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
14987 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
14988 section
= &cu
->dwo_unit
->dwo_file
->sections
.line
;
14989 else if (cu
->per_cu
->is_dwz
)
14991 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
14993 section
= &dwz
->line
;
14996 section
= &dwarf2_per_objfile
->line
;
15001 /* Read the statement program header starting at OFFSET in
15002 .debug_line, or .debug_line.dwo. Return a pointer
15003 to a struct line_header, allocated using xmalloc.
15005 NOTE: the strings in the include directory and file name tables of
15006 the returned object point into the dwarf line section buffer,
15007 and must not be freed. */
15009 static struct line_header
*
15010 dwarf_decode_line_header (unsigned int offset
, struct dwarf2_cu
*cu
)
15012 struct cleanup
*back_to
;
15013 struct line_header
*lh
;
15014 gdb_byte
*line_ptr
;
15015 unsigned int bytes_read
, offset_size
;
15017 char *cur_dir
, *cur_file
;
15018 struct dwarf2_section_info
*section
;
15021 section
= get_debug_line_section (cu
);
15022 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
15023 if (section
->buffer
== NULL
)
15025 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
15026 complaint (&symfile_complaints
, _("missing .debug_line.dwo section"));
15028 complaint (&symfile_complaints
, _("missing .debug_line section"));
15032 /* We can't do this until we know the section is non-empty.
15033 Only then do we know we have such a section. */
15034 abfd
= section
->asection
->owner
;
15036 /* Make sure that at least there's room for the total_length field.
15037 That could be 12 bytes long, but we're just going to fudge that. */
15038 if (offset
+ 4 >= section
->size
)
15040 dwarf2_statement_list_fits_in_line_number_section_complaint ();
15044 lh
= xmalloc (sizeof (*lh
));
15045 memset (lh
, 0, sizeof (*lh
));
15046 back_to
= make_cleanup ((make_cleanup_ftype
*) free_line_header
,
15049 line_ptr
= section
->buffer
+ offset
;
15051 /* Read in the header. */
15053 read_checked_initial_length_and_offset (abfd
, line_ptr
, &cu
->header
,
15054 &bytes_read
, &offset_size
);
15055 line_ptr
+= bytes_read
;
15056 if (line_ptr
+ lh
->total_length
> (section
->buffer
+ section
->size
))
15058 dwarf2_statement_list_fits_in_line_number_section_complaint ();
15061 lh
->statement_program_end
= line_ptr
+ lh
->total_length
;
15062 lh
->version
= read_2_bytes (abfd
, line_ptr
);
15064 lh
->header_length
= read_offset_1 (abfd
, line_ptr
, offset_size
);
15065 line_ptr
+= offset_size
;
15066 lh
->minimum_instruction_length
= read_1_byte (abfd
, line_ptr
);
15068 if (lh
->version
>= 4)
15070 lh
->maximum_ops_per_instruction
= read_1_byte (abfd
, line_ptr
);
15074 lh
->maximum_ops_per_instruction
= 1;
15076 if (lh
->maximum_ops_per_instruction
== 0)
15078 lh
->maximum_ops_per_instruction
= 1;
15079 complaint (&symfile_complaints
,
15080 _("invalid maximum_ops_per_instruction "
15081 "in `.debug_line' section"));
15084 lh
->default_is_stmt
= read_1_byte (abfd
, line_ptr
);
15086 lh
->line_base
= read_1_signed_byte (abfd
, line_ptr
);
15088 lh
->line_range
= read_1_byte (abfd
, line_ptr
);
15090 lh
->opcode_base
= read_1_byte (abfd
, line_ptr
);
15092 lh
->standard_opcode_lengths
15093 = xmalloc (lh
->opcode_base
* sizeof (lh
->standard_opcode_lengths
[0]));
15095 lh
->standard_opcode_lengths
[0] = 1; /* This should never be used anyway. */
15096 for (i
= 1; i
< lh
->opcode_base
; ++i
)
15098 lh
->standard_opcode_lengths
[i
] = read_1_byte (abfd
, line_ptr
);
15102 /* Read directory table. */
15103 while ((cur_dir
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
15105 line_ptr
+= bytes_read
;
15106 add_include_dir (lh
, cur_dir
);
15108 line_ptr
+= bytes_read
;
15110 /* Read file name table. */
15111 while ((cur_file
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
15113 unsigned int dir_index
, mod_time
, length
;
15115 line_ptr
+= bytes_read
;
15116 dir_index
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
15117 line_ptr
+= bytes_read
;
15118 mod_time
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
15119 line_ptr
+= bytes_read
;
15120 length
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
15121 line_ptr
+= bytes_read
;
15123 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
15125 line_ptr
+= bytes_read
;
15126 lh
->statement_program_start
= line_ptr
;
15128 if (line_ptr
> (section
->buffer
+ section
->size
))
15129 complaint (&symfile_complaints
,
15130 _("line number info header doesn't "
15131 "fit in `.debug_line' section"));
15133 discard_cleanups (back_to
);
15137 /* Subroutine of dwarf_decode_lines to simplify it.
15138 Return the file name of the psymtab for included file FILE_INDEX
15139 in line header LH of PST.
15140 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
15141 If space for the result is malloc'd, it will be freed by a cleanup.
15142 Returns NULL if FILE_INDEX should be ignored, i.e., it is pst->filename.
15144 The function creates dangling cleanup registration. */
15147 psymtab_include_file_name (const struct line_header
*lh
, int file_index
,
15148 const struct partial_symtab
*pst
,
15149 const char *comp_dir
)
15151 const struct file_entry fe
= lh
->file_names
[file_index
];
15152 char *include_name
= fe
.name
;
15153 char *include_name_to_compare
= include_name
;
15154 char *dir_name
= NULL
;
15155 const char *pst_filename
;
15156 char *copied_name
= NULL
;
15160 dir_name
= lh
->include_dirs
[fe
.dir_index
- 1];
15162 if (!IS_ABSOLUTE_PATH (include_name
)
15163 && (dir_name
!= NULL
|| comp_dir
!= NULL
))
15165 /* Avoid creating a duplicate psymtab for PST.
15166 We do this by comparing INCLUDE_NAME and PST_FILENAME.
15167 Before we do the comparison, however, we need to account
15168 for DIR_NAME and COMP_DIR.
15169 First prepend dir_name (if non-NULL). If we still don't
15170 have an absolute path prepend comp_dir (if non-NULL).
15171 However, the directory we record in the include-file's
15172 psymtab does not contain COMP_DIR (to match the
15173 corresponding symtab(s)).
15178 bash$ gcc -g ./hello.c
15179 include_name = "hello.c"
15181 DW_AT_comp_dir = comp_dir = "/tmp"
15182 DW_AT_name = "./hello.c" */
15184 if (dir_name
!= NULL
)
15186 include_name
= concat (dir_name
, SLASH_STRING
,
15187 include_name
, (char *)NULL
);
15188 include_name_to_compare
= include_name
;
15189 make_cleanup (xfree
, include_name
);
15191 if (!IS_ABSOLUTE_PATH (include_name
) && comp_dir
!= NULL
)
15193 include_name_to_compare
= concat (comp_dir
, SLASH_STRING
,
15194 include_name
, (char *)NULL
);
15198 pst_filename
= pst
->filename
;
15199 if (!IS_ABSOLUTE_PATH (pst_filename
) && pst
->dirname
!= NULL
)
15201 copied_name
= concat (pst
->dirname
, SLASH_STRING
,
15202 pst_filename
, (char *)NULL
);
15203 pst_filename
= copied_name
;
15206 file_is_pst
= FILENAME_CMP (include_name_to_compare
, pst_filename
) == 0;
15208 if (include_name_to_compare
!= include_name
)
15209 xfree (include_name_to_compare
);
15210 if (copied_name
!= NULL
)
15211 xfree (copied_name
);
15215 return include_name
;
15218 /* Ignore this record_line request. */
15221 noop_record_line (struct subfile
*subfile
, int line
, CORE_ADDR pc
)
15226 /* Subroutine of dwarf_decode_lines to simplify it.
15227 Process the line number information in LH. */
15230 dwarf_decode_lines_1 (struct line_header
*lh
, const char *comp_dir
,
15231 struct dwarf2_cu
*cu
, struct partial_symtab
*pst
)
15233 gdb_byte
*line_ptr
, *extended_end
;
15234 gdb_byte
*line_end
;
15235 unsigned int bytes_read
, extended_len
;
15236 unsigned char op_code
, extended_op
, adj_opcode
;
15237 CORE_ADDR baseaddr
;
15238 struct objfile
*objfile
= cu
->objfile
;
15239 bfd
*abfd
= objfile
->obfd
;
15240 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
15241 const int decode_for_pst_p
= (pst
!= NULL
);
15242 struct subfile
*last_subfile
= NULL
;
15243 void (*p_record_line
) (struct subfile
*subfile
, int line
, CORE_ADDR pc
)
15246 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
15248 line_ptr
= lh
->statement_program_start
;
15249 line_end
= lh
->statement_program_end
;
15251 /* Read the statement sequences until there's nothing left. */
15252 while (line_ptr
< line_end
)
15254 /* state machine registers */
15255 CORE_ADDR address
= 0;
15256 unsigned int file
= 1;
15257 unsigned int line
= 1;
15258 unsigned int column
= 0;
15259 int is_stmt
= lh
->default_is_stmt
;
15260 int basic_block
= 0;
15261 int end_sequence
= 0;
15263 unsigned char op_index
= 0;
15265 if (!decode_for_pst_p
&& lh
->num_file_names
>= file
)
15267 /* Start a subfile for the current file of the state machine. */
15268 /* lh->include_dirs and lh->file_names are 0-based, but the
15269 directory and file name numbers in the statement program
15271 struct file_entry
*fe
= &lh
->file_names
[file
- 1];
15275 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
15277 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
15280 /* Decode the table. */
15281 while (!end_sequence
)
15283 op_code
= read_1_byte (abfd
, line_ptr
);
15285 if (line_ptr
> line_end
)
15287 dwarf2_debug_line_missing_end_sequence_complaint ();
15291 if (op_code
>= lh
->opcode_base
)
15293 /* Special operand. */
15294 adj_opcode
= op_code
- lh
->opcode_base
;
15295 address
+= (((op_index
+ (adj_opcode
/ lh
->line_range
))
15296 / lh
->maximum_ops_per_instruction
)
15297 * lh
->minimum_instruction_length
);
15298 op_index
= ((op_index
+ (adj_opcode
/ lh
->line_range
))
15299 % lh
->maximum_ops_per_instruction
);
15300 line
+= lh
->line_base
+ (adj_opcode
% lh
->line_range
);
15301 if (lh
->num_file_names
< file
|| file
== 0)
15302 dwarf2_debug_line_missing_file_complaint ();
15303 /* For now we ignore lines not starting on an
15304 instruction boundary. */
15305 else if (op_index
== 0)
15307 lh
->file_names
[file
- 1].included_p
= 1;
15308 if (!decode_for_pst_p
&& is_stmt
)
15310 if (last_subfile
!= current_subfile
)
15312 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
15314 (*p_record_line
) (last_subfile
, 0, addr
);
15315 last_subfile
= current_subfile
;
15317 /* Append row to matrix using current values. */
15318 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
15319 (*p_record_line
) (current_subfile
, line
, addr
);
15324 else switch (op_code
)
15326 case DW_LNS_extended_op
:
15327 extended_len
= read_unsigned_leb128 (abfd
, line_ptr
,
15329 line_ptr
+= bytes_read
;
15330 extended_end
= line_ptr
+ extended_len
;
15331 extended_op
= read_1_byte (abfd
, line_ptr
);
15333 switch (extended_op
)
15335 case DW_LNE_end_sequence
:
15336 p_record_line
= record_line
;
15339 case DW_LNE_set_address
:
15340 address
= read_address (abfd
, line_ptr
, cu
, &bytes_read
);
15342 if (address
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
15344 /* This line table is for a function which has been
15345 GCd by the linker. Ignore it. PR gdb/12528 */
15348 = line_ptr
- get_debug_line_section (cu
)->buffer
;
15350 complaint (&symfile_complaints
,
15351 _(".debug_line address at offset 0x%lx is 0 "
15353 line_offset
, objfile
->name
);
15354 p_record_line
= noop_record_line
;
15358 line_ptr
+= bytes_read
;
15359 address
+= baseaddr
;
15361 case DW_LNE_define_file
:
15364 unsigned int dir_index
, mod_time
, length
;
15366 cur_file
= read_direct_string (abfd
, line_ptr
,
15368 line_ptr
+= bytes_read
;
15370 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
15371 line_ptr
+= bytes_read
;
15373 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
15374 line_ptr
+= bytes_read
;
15376 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
15377 line_ptr
+= bytes_read
;
15378 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
15381 case DW_LNE_set_discriminator
:
15382 /* The discriminator is not interesting to the debugger;
15384 line_ptr
= extended_end
;
15387 complaint (&symfile_complaints
,
15388 _("mangled .debug_line section"));
15391 /* Make sure that we parsed the extended op correctly. If e.g.
15392 we expected a different address size than the producer used,
15393 we may have read the wrong number of bytes. */
15394 if (line_ptr
!= extended_end
)
15396 complaint (&symfile_complaints
,
15397 _("mangled .debug_line section"));
15402 if (lh
->num_file_names
< file
|| file
== 0)
15403 dwarf2_debug_line_missing_file_complaint ();
15406 lh
->file_names
[file
- 1].included_p
= 1;
15407 if (!decode_for_pst_p
&& is_stmt
)
15409 if (last_subfile
!= current_subfile
)
15411 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
15413 (*p_record_line
) (last_subfile
, 0, addr
);
15414 last_subfile
= current_subfile
;
15416 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
15417 (*p_record_line
) (current_subfile
, line
, addr
);
15422 case DW_LNS_advance_pc
:
15425 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
15427 address
+= (((op_index
+ adjust
)
15428 / lh
->maximum_ops_per_instruction
)
15429 * lh
->minimum_instruction_length
);
15430 op_index
= ((op_index
+ adjust
)
15431 % lh
->maximum_ops_per_instruction
);
15432 line_ptr
+= bytes_read
;
15435 case DW_LNS_advance_line
:
15436 line
+= read_signed_leb128 (abfd
, line_ptr
, &bytes_read
);
15437 line_ptr
+= bytes_read
;
15439 case DW_LNS_set_file
:
15441 /* The arrays lh->include_dirs and lh->file_names are
15442 0-based, but the directory and file name numbers in
15443 the statement program are 1-based. */
15444 struct file_entry
*fe
;
15447 file
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
15448 line_ptr
+= bytes_read
;
15449 if (lh
->num_file_names
< file
|| file
== 0)
15450 dwarf2_debug_line_missing_file_complaint ();
15453 fe
= &lh
->file_names
[file
- 1];
15455 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
15456 if (!decode_for_pst_p
)
15458 last_subfile
= current_subfile
;
15459 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
15464 case DW_LNS_set_column
:
15465 column
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
15466 line_ptr
+= bytes_read
;
15468 case DW_LNS_negate_stmt
:
15469 is_stmt
= (!is_stmt
);
15471 case DW_LNS_set_basic_block
:
15474 /* Add to the address register of the state machine the
15475 address increment value corresponding to special opcode
15476 255. I.e., this value is scaled by the minimum
15477 instruction length since special opcode 255 would have
15478 scaled the increment. */
15479 case DW_LNS_const_add_pc
:
15481 CORE_ADDR adjust
= (255 - lh
->opcode_base
) / lh
->line_range
;
15483 address
+= (((op_index
+ adjust
)
15484 / lh
->maximum_ops_per_instruction
)
15485 * lh
->minimum_instruction_length
);
15486 op_index
= ((op_index
+ adjust
)
15487 % lh
->maximum_ops_per_instruction
);
15490 case DW_LNS_fixed_advance_pc
:
15491 address
+= read_2_bytes (abfd
, line_ptr
);
15497 /* Unknown standard opcode, ignore it. */
15500 for (i
= 0; i
< lh
->standard_opcode_lengths
[op_code
]; i
++)
15502 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
15503 line_ptr
+= bytes_read
;
15508 if (lh
->num_file_names
< file
|| file
== 0)
15509 dwarf2_debug_line_missing_file_complaint ();
15512 lh
->file_names
[file
- 1].included_p
= 1;
15513 if (!decode_for_pst_p
)
15515 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
15516 (*p_record_line
) (current_subfile
, 0, addr
);
15522 /* Decode the Line Number Program (LNP) for the given line_header
15523 structure and CU. The actual information extracted and the type
15524 of structures created from the LNP depends on the value of PST.
15526 1. If PST is NULL, then this procedure uses the data from the program
15527 to create all necessary symbol tables, and their linetables.
15529 2. If PST is not NULL, this procedure reads the program to determine
15530 the list of files included by the unit represented by PST, and
15531 builds all the associated partial symbol tables.
15533 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
15534 It is used for relative paths in the line table.
15535 NOTE: When processing partial symtabs (pst != NULL),
15536 comp_dir == pst->dirname.
15538 NOTE: It is important that psymtabs have the same file name (via strcmp)
15539 as the corresponding symtab. Since COMP_DIR is not used in the name of the
15540 symtab we don't use it in the name of the psymtabs we create.
15541 E.g. expand_line_sal requires this when finding psymtabs to expand.
15542 A good testcase for this is mb-inline.exp. */
15545 dwarf_decode_lines (struct line_header
*lh
, const char *comp_dir
,
15546 struct dwarf2_cu
*cu
, struct partial_symtab
*pst
,
15547 int want_line_info
)
15549 struct objfile
*objfile
= cu
->objfile
;
15550 const int decode_for_pst_p
= (pst
!= NULL
);
15551 struct subfile
*first_subfile
= current_subfile
;
15553 if (want_line_info
)
15554 dwarf_decode_lines_1 (lh
, comp_dir
, cu
, pst
);
15556 if (decode_for_pst_p
)
15560 /* Now that we're done scanning the Line Header Program, we can
15561 create the psymtab of each included file. */
15562 for (file_index
= 0; file_index
< lh
->num_file_names
; file_index
++)
15563 if (lh
->file_names
[file_index
].included_p
== 1)
15565 char *include_name
=
15566 psymtab_include_file_name (lh
, file_index
, pst
, comp_dir
);
15567 if (include_name
!= NULL
)
15568 dwarf2_create_include_psymtab (include_name
, pst
, objfile
);
15573 /* Make sure a symtab is created for every file, even files
15574 which contain only variables (i.e. no code with associated
15578 for (i
= 0; i
< lh
->num_file_names
; i
++)
15581 struct file_entry
*fe
;
15583 fe
= &lh
->file_names
[i
];
15585 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
15586 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
15588 /* Skip the main file; we don't need it, and it must be
15589 allocated last, so that it will show up before the
15590 non-primary symtabs in the objfile's symtab list. */
15591 if (current_subfile
== first_subfile
)
15594 if (current_subfile
->symtab
== NULL
)
15595 current_subfile
->symtab
= allocate_symtab (current_subfile
->name
,
15597 fe
->symtab
= current_subfile
->symtab
;
15602 /* Start a subfile for DWARF. FILENAME is the name of the file and
15603 DIRNAME the name of the source directory which contains FILENAME
15604 or NULL if not known. COMP_DIR is the compilation directory for the
15605 linetable's compilation unit or NULL if not known.
15606 This routine tries to keep line numbers from identical absolute and
15607 relative file names in a common subfile.
15609 Using the `list' example from the GDB testsuite, which resides in
15610 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
15611 of /srcdir/list0.c yields the following debugging information for list0.c:
15613 DW_AT_name: /srcdir/list0.c
15614 DW_AT_comp_dir: /compdir
15615 files.files[0].name: list0.h
15616 files.files[0].dir: /srcdir
15617 files.files[1].name: list0.c
15618 files.files[1].dir: /srcdir
15620 The line number information for list0.c has to end up in a single
15621 subfile, so that `break /srcdir/list0.c:1' works as expected.
15622 start_subfile will ensure that this happens provided that we pass the
15623 concatenation of files.files[1].dir and files.files[1].name as the
15627 dwarf2_start_subfile (char *filename
, const char *dirname
,
15628 const char *comp_dir
)
15632 /* While reading the DIEs, we call start_symtab(DW_AT_name, DW_AT_comp_dir).
15633 `start_symtab' will always pass the contents of DW_AT_comp_dir as
15634 second argument to start_subfile. To be consistent, we do the
15635 same here. In order not to lose the line information directory,
15636 we concatenate it to the filename when it makes sense.
15637 Note that the Dwarf3 standard says (speaking of filenames in line
15638 information): ``The directory index is ignored for file names
15639 that represent full path names''. Thus ignoring dirname in the
15640 `else' branch below isn't an issue. */
15642 if (!IS_ABSOLUTE_PATH (filename
) && dirname
!= NULL
)
15643 fullname
= concat (dirname
, SLASH_STRING
, filename
, (char *)NULL
);
15645 fullname
= filename
;
15647 start_subfile (fullname
, comp_dir
);
15649 if (fullname
!= filename
)
15653 /* Start a symtab for DWARF.
15654 NAME, COMP_DIR, LOW_PC are passed to start_symtab. */
15657 dwarf2_start_symtab (struct dwarf2_cu
*cu
,
15658 const char *name
, const char *comp_dir
, CORE_ADDR low_pc
)
15660 start_symtab (name
, comp_dir
, low_pc
);
15661 record_debugformat ("DWARF 2");
15662 record_producer (cu
->producer
);
15664 /* We assume that we're processing GCC output. */
15665 processing_gcc_compilation
= 2;
15667 cu
->processing_has_namespace_info
= 0;
15671 var_decode_location (struct attribute
*attr
, struct symbol
*sym
,
15672 struct dwarf2_cu
*cu
)
15674 struct objfile
*objfile
= cu
->objfile
;
15675 struct comp_unit_head
*cu_header
= &cu
->header
;
15677 /* NOTE drow/2003-01-30: There used to be a comment and some special
15678 code here to turn a symbol with DW_AT_external and a
15679 SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
15680 necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
15681 with some versions of binutils) where shared libraries could have
15682 relocations against symbols in their debug information - the
15683 minimal symbol would have the right address, but the debug info
15684 would not. It's no longer necessary, because we will explicitly
15685 apply relocations when we read in the debug information now. */
15687 /* A DW_AT_location attribute with no contents indicates that a
15688 variable has been optimized away. */
15689 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0)
15691 SYMBOL_CLASS (sym
) = LOC_OPTIMIZED_OUT
;
15695 /* Handle one degenerate form of location expression specially, to
15696 preserve GDB's previous behavior when section offsets are
15697 specified. If this is just a DW_OP_addr or DW_OP_GNU_addr_index
15698 then mark this symbol as LOC_STATIC. */
15700 if (attr_form_is_block (attr
)
15701 && ((DW_BLOCK (attr
)->data
[0] == DW_OP_addr
15702 && DW_BLOCK (attr
)->size
== 1 + cu_header
->addr_size
)
15703 || (DW_BLOCK (attr
)->data
[0] == DW_OP_GNU_addr_index
15704 && (DW_BLOCK (attr
)->size
15705 == 1 + leb128_size (&DW_BLOCK (attr
)->data
[1])))))
15707 unsigned int dummy
;
15709 if (DW_BLOCK (attr
)->data
[0] == DW_OP_addr
)
15710 SYMBOL_VALUE_ADDRESS (sym
) =
15711 read_address (objfile
->obfd
, DW_BLOCK (attr
)->data
+ 1, cu
, &dummy
);
15713 SYMBOL_VALUE_ADDRESS (sym
) =
15714 read_addr_index_from_leb128 (cu
, DW_BLOCK (attr
)->data
+ 1, &dummy
);
15715 SYMBOL_CLASS (sym
) = LOC_STATIC
;
15716 fixup_symbol_section (sym
, objfile
);
15717 SYMBOL_VALUE_ADDRESS (sym
) += ANOFFSET (objfile
->section_offsets
,
15718 SYMBOL_SECTION (sym
));
15722 /* NOTE drow/2002-01-30: It might be worthwhile to have a static
15723 expression evaluator, and use LOC_COMPUTED only when necessary
15724 (i.e. when the value of a register or memory location is
15725 referenced, or a thread-local block, etc.). Then again, it might
15726 not be worthwhile. I'm assuming that it isn't unless performance
15727 or memory numbers show me otherwise. */
15729 dwarf2_symbol_mark_computed (attr
, sym
, cu
);
15730 SYMBOL_CLASS (sym
) = LOC_COMPUTED
;
15732 if (SYMBOL_COMPUTED_OPS (sym
) == &dwarf2_loclist_funcs
)
15733 cu
->has_loclist
= 1;
15736 /* Given a pointer to a DWARF information entry, figure out if we need
15737 to make a symbol table entry for it, and if so, create a new entry
15738 and return a pointer to it.
15739 If TYPE is NULL, determine symbol type from the die, otherwise
15740 used the passed type.
15741 If SPACE is not NULL, use it to hold the new symbol. If it is
15742 NULL, allocate a new symbol on the objfile's obstack. */
15744 static struct symbol
*
15745 new_symbol_full (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
,
15746 struct symbol
*space
)
15748 struct objfile
*objfile
= cu
->objfile
;
15749 struct symbol
*sym
= NULL
;
15751 struct attribute
*attr
= NULL
;
15752 struct attribute
*attr2
= NULL
;
15753 CORE_ADDR baseaddr
;
15754 struct pending
**list_to_add
= NULL
;
15756 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
15758 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
15760 name
= dwarf2_name (die
, cu
);
15763 const char *linkagename
;
15764 int suppress_add
= 0;
15769 sym
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct symbol
);
15770 OBJSTAT (objfile
, n_syms
++);
15772 /* Cache this symbol's name and the name's demangled form (if any). */
15773 SYMBOL_SET_LANGUAGE (sym
, cu
->language
);
15774 linkagename
= dwarf2_physname (name
, die
, cu
);
15775 SYMBOL_SET_NAMES (sym
, linkagename
, strlen (linkagename
), 0, objfile
);
15777 /* Fortran does not have mangling standard and the mangling does differ
15778 between gfortran, iFort etc. */
15779 if (cu
->language
== language_fortran
15780 && symbol_get_demangled_name (&(sym
->ginfo
)) == NULL
)
15781 symbol_set_demangled_name (&(sym
->ginfo
),
15782 dwarf2_full_name (name
, die
, cu
),
15785 /* Default assumptions.
15786 Use the passed type or decode it from the die. */
15787 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
15788 SYMBOL_CLASS (sym
) = LOC_OPTIMIZED_OUT
;
15790 SYMBOL_TYPE (sym
) = type
;
15792 SYMBOL_TYPE (sym
) = die_type (die
, cu
);
15793 attr
= dwarf2_attr (die
,
15794 inlined_func
? DW_AT_call_line
: DW_AT_decl_line
,
15798 SYMBOL_LINE (sym
) = DW_UNSND (attr
);
15801 attr
= dwarf2_attr (die
,
15802 inlined_func
? DW_AT_call_file
: DW_AT_decl_file
,
15806 int file_index
= DW_UNSND (attr
);
15808 if (cu
->line_header
== NULL
15809 || file_index
> cu
->line_header
->num_file_names
)
15810 complaint (&symfile_complaints
,
15811 _("file index out of range"));
15812 else if (file_index
> 0)
15814 struct file_entry
*fe
;
15816 fe
= &cu
->line_header
->file_names
[file_index
- 1];
15817 SYMBOL_SYMTAB (sym
) = fe
->symtab
;
15824 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
15827 SYMBOL_VALUE_ADDRESS (sym
) = DW_ADDR (attr
) + baseaddr
;
15829 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_core_addr
;
15830 SYMBOL_DOMAIN (sym
) = LABEL_DOMAIN
;
15831 SYMBOL_CLASS (sym
) = LOC_LABEL
;
15832 add_symbol_to_list (sym
, cu
->list_in_scope
);
15834 case DW_TAG_subprogram
:
15835 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
15837 SYMBOL_CLASS (sym
) = LOC_BLOCK
;
15838 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
15839 if ((attr2
&& (DW_UNSND (attr2
) != 0))
15840 || cu
->language
== language_ada
)
15842 /* Subprograms marked external are stored as a global symbol.
15843 Ada subprograms, whether marked external or not, are always
15844 stored as a global symbol, because we want to be able to
15845 access them globally. For instance, we want to be able
15846 to break on a nested subprogram without having to
15847 specify the context. */
15848 list_to_add
= &global_symbols
;
15852 list_to_add
= cu
->list_in_scope
;
15855 case DW_TAG_inlined_subroutine
:
15856 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
15858 SYMBOL_CLASS (sym
) = LOC_BLOCK
;
15859 SYMBOL_INLINED (sym
) = 1;
15860 list_to_add
= cu
->list_in_scope
;
15862 case DW_TAG_template_value_param
:
15864 /* Fall through. */
15865 case DW_TAG_constant
:
15866 case DW_TAG_variable
:
15867 case DW_TAG_member
:
15868 /* Compilation with minimal debug info may result in
15869 variables with missing type entries. Change the
15870 misleading `void' type to something sensible. */
15871 if (TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_VOID
)
15873 = objfile_type (objfile
)->nodebug_data_symbol
;
15875 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
15876 /* In the case of DW_TAG_member, we should only be called for
15877 static const members. */
15878 if (die
->tag
== DW_TAG_member
)
15880 /* dwarf2_add_field uses die_is_declaration,
15881 so we do the same. */
15882 gdb_assert (die_is_declaration (die
, cu
));
15887 dwarf2_const_value (attr
, sym
, cu
);
15888 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
15891 if (attr2
&& (DW_UNSND (attr2
) != 0))
15892 list_to_add
= &global_symbols
;
15894 list_to_add
= cu
->list_in_scope
;
15898 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
15901 var_decode_location (attr
, sym
, cu
);
15902 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
15904 /* Fortran explicitly imports any global symbols to the local
15905 scope by DW_TAG_common_block. */
15906 if (cu
->language
== language_fortran
&& die
->parent
15907 && die
->parent
->tag
== DW_TAG_common_block
)
15910 if (SYMBOL_CLASS (sym
) == LOC_STATIC
15911 && SYMBOL_VALUE_ADDRESS (sym
) == 0
15912 && !dwarf2_per_objfile
->has_section_at_zero
)
15914 /* When a static variable is eliminated by the linker,
15915 the corresponding debug information is not stripped
15916 out, but the variable address is set to null;
15917 do not add such variables into symbol table. */
15919 else if (attr2
&& (DW_UNSND (attr2
) != 0))
15921 /* Workaround gfortran PR debug/40040 - it uses
15922 DW_AT_location for variables in -fPIC libraries which may
15923 get overriden by other libraries/executable and get
15924 a different address. Resolve it by the minimal symbol
15925 which may come from inferior's executable using copy
15926 relocation. Make this workaround only for gfortran as for
15927 other compilers GDB cannot guess the minimal symbol
15928 Fortran mangling kind. */
15929 if (cu
->language
== language_fortran
&& die
->parent
15930 && die
->parent
->tag
== DW_TAG_module
15932 && strncmp (cu
->producer
, "GNU Fortran ", 12) == 0)
15933 SYMBOL_CLASS (sym
) = LOC_UNRESOLVED
;
15935 /* A variable with DW_AT_external is never static,
15936 but it may be block-scoped. */
15937 list_to_add
= (cu
->list_in_scope
== &file_symbols
15938 ? &global_symbols
: cu
->list_in_scope
);
15941 list_to_add
= cu
->list_in_scope
;
15945 /* We do not know the address of this symbol.
15946 If it is an external symbol and we have type information
15947 for it, enter the symbol as a LOC_UNRESOLVED symbol.
15948 The address of the variable will then be determined from
15949 the minimal symbol table whenever the variable is
15951 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
15953 /* Fortran explicitly imports any global symbols to the local
15954 scope by DW_TAG_common_block. */
15955 if (cu
->language
== language_fortran
&& die
->parent
15956 && die
->parent
->tag
== DW_TAG_common_block
)
15958 /* SYMBOL_CLASS doesn't matter here because
15959 read_common_block is going to reset it. */
15961 list_to_add
= cu
->list_in_scope
;
15963 else if (attr2
&& (DW_UNSND (attr2
) != 0)
15964 && dwarf2_attr (die
, DW_AT_type
, cu
) != NULL
)
15966 /* A variable with DW_AT_external is never static, but it
15967 may be block-scoped. */
15968 list_to_add
= (cu
->list_in_scope
== &file_symbols
15969 ? &global_symbols
: cu
->list_in_scope
);
15971 SYMBOL_CLASS (sym
) = LOC_UNRESOLVED
;
15973 else if (!die_is_declaration (die
, cu
))
15975 /* Use the default LOC_OPTIMIZED_OUT class. */
15976 gdb_assert (SYMBOL_CLASS (sym
) == LOC_OPTIMIZED_OUT
);
15978 list_to_add
= cu
->list_in_scope
;
15982 case DW_TAG_formal_parameter
:
15983 /* If we are inside a function, mark this as an argument. If
15984 not, we might be looking at an argument to an inlined function
15985 when we do not have enough information to show inlined frames;
15986 pretend it's a local variable in that case so that the user can
15988 if (context_stack_depth
> 0
15989 && context_stack
[context_stack_depth
- 1].name
!= NULL
)
15990 SYMBOL_IS_ARGUMENT (sym
) = 1;
15991 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
15994 var_decode_location (attr
, sym
, cu
);
15996 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
15999 dwarf2_const_value (attr
, sym
, cu
);
16002 list_to_add
= cu
->list_in_scope
;
16004 case DW_TAG_unspecified_parameters
:
16005 /* From varargs functions; gdb doesn't seem to have any
16006 interest in this information, so just ignore it for now.
16009 case DW_TAG_template_type_param
:
16011 /* Fall through. */
16012 case DW_TAG_class_type
:
16013 case DW_TAG_interface_type
:
16014 case DW_TAG_structure_type
:
16015 case DW_TAG_union_type
:
16016 case DW_TAG_set_type
:
16017 case DW_TAG_enumeration_type
:
16018 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
16019 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
16022 /* NOTE: carlton/2003-11-10: C++ and Java class symbols shouldn't
16023 really ever be static objects: otherwise, if you try
16024 to, say, break of a class's method and you're in a file
16025 which doesn't mention that class, it won't work unless
16026 the check for all static symbols in lookup_symbol_aux
16027 saves you. See the OtherFileClass tests in
16028 gdb.c++/namespace.exp. */
16032 list_to_add
= (cu
->list_in_scope
== &file_symbols
16033 && (cu
->language
== language_cplus
16034 || cu
->language
== language_java
)
16035 ? &global_symbols
: cu
->list_in_scope
);
16037 /* The semantics of C++ state that "struct foo {
16038 ... }" also defines a typedef for "foo". A Java
16039 class declaration also defines a typedef for the
16041 if (cu
->language
== language_cplus
16042 || cu
->language
== language_java
16043 || cu
->language
== language_ada
)
16045 /* The symbol's name is already allocated along
16046 with this objfile, so we don't need to
16047 duplicate it for the type. */
16048 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
16049 TYPE_NAME (SYMBOL_TYPE (sym
)) = SYMBOL_SEARCH_NAME (sym
);
16054 case DW_TAG_typedef
:
16055 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
16056 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
16057 list_to_add
= cu
->list_in_scope
;
16059 case DW_TAG_base_type
:
16060 case DW_TAG_subrange_type
:
16061 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
16062 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
16063 list_to_add
= cu
->list_in_scope
;
16065 case DW_TAG_enumerator
:
16066 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
16069 dwarf2_const_value (attr
, sym
, cu
);
16072 /* NOTE: carlton/2003-11-10: See comment above in the
16073 DW_TAG_class_type, etc. block. */
16075 list_to_add
= (cu
->list_in_scope
== &file_symbols
16076 && (cu
->language
== language_cplus
16077 || cu
->language
== language_java
)
16078 ? &global_symbols
: cu
->list_in_scope
);
16081 case DW_TAG_namespace
:
16082 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
16083 list_to_add
= &global_symbols
;
16085 case DW_TAG_common_block
:
16086 SYMBOL_CLASS (sym
) = LOC_COMMON_BLOCK
;
16087 SYMBOL_DOMAIN (sym
) = COMMON_BLOCK_DOMAIN
;
16088 add_symbol_to_list (sym
, cu
->list_in_scope
);
16091 /* Not a tag we recognize. Hopefully we aren't processing
16092 trash data, but since we must specifically ignore things
16093 we don't recognize, there is nothing else we should do at
16095 complaint (&symfile_complaints
, _("unsupported tag: '%s'"),
16096 dwarf_tag_name (die
->tag
));
16102 sym
->hash_next
= objfile
->template_symbols
;
16103 objfile
->template_symbols
= sym
;
16104 list_to_add
= NULL
;
16107 if (list_to_add
!= NULL
)
16108 add_symbol_to_list (sym
, list_to_add
);
16110 /* For the benefit of old versions of GCC, check for anonymous
16111 namespaces based on the demangled name. */
16112 if (!cu
->processing_has_namespace_info
16113 && cu
->language
== language_cplus
)
16114 cp_scan_for_anonymous_namespaces (sym
, objfile
);
16119 /* A wrapper for new_symbol_full that always allocates a new symbol. */
16121 static struct symbol
*
16122 new_symbol (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
16124 return new_symbol_full (die
, type
, cu
, NULL
);
16127 /* Given an attr with a DW_FORM_dataN value in host byte order,
16128 zero-extend it as appropriate for the symbol's type. The DWARF
16129 standard (v4) is not entirely clear about the meaning of using
16130 DW_FORM_dataN for a constant with a signed type, where the type is
16131 wider than the data. The conclusion of a discussion on the DWARF
16132 list was that this is unspecified. We choose to always zero-extend
16133 because that is the interpretation long in use by GCC. */
16136 dwarf2_const_value_data (struct attribute
*attr
, struct type
*type
,
16137 const char *name
, struct obstack
*obstack
,
16138 struct dwarf2_cu
*cu
, LONGEST
*value
, int bits
)
16140 struct objfile
*objfile
= cu
->objfile
;
16141 enum bfd_endian byte_order
= bfd_big_endian (objfile
->obfd
) ?
16142 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
;
16143 LONGEST l
= DW_UNSND (attr
);
16145 if (bits
< sizeof (*value
) * 8)
16147 l
&= ((LONGEST
) 1 << bits
) - 1;
16150 else if (bits
== sizeof (*value
) * 8)
16154 gdb_byte
*bytes
= obstack_alloc (obstack
, bits
/ 8);
16155 store_unsigned_integer (bytes
, bits
/ 8, byte_order
, l
);
16162 /* Read a constant value from an attribute. Either set *VALUE, or if
16163 the value does not fit in *VALUE, set *BYTES - either already
16164 allocated on the objfile obstack, or newly allocated on OBSTACK,
16165 or, set *BATON, if we translated the constant to a location
16169 dwarf2_const_value_attr (struct attribute
*attr
, struct type
*type
,
16170 const char *name
, struct obstack
*obstack
,
16171 struct dwarf2_cu
*cu
,
16172 LONGEST
*value
, gdb_byte
**bytes
,
16173 struct dwarf2_locexpr_baton
**baton
)
16175 struct objfile
*objfile
= cu
->objfile
;
16176 struct comp_unit_head
*cu_header
= &cu
->header
;
16177 struct dwarf_block
*blk
;
16178 enum bfd_endian byte_order
= (bfd_big_endian (objfile
->obfd
) ?
16179 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
16185 switch (attr
->form
)
16188 case DW_FORM_GNU_addr_index
:
16192 if (TYPE_LENGTH (type
) != cu_header
->addr_size
)
16193 dwarf2_const_value_length_mismatch_complaint (name
,
16194 cu_header
->addr_size
,
16195 TYPE_LENGTH (type
));
16196 /* Symbols of this form are reasonably rare, so we just
16197 piggyback on the existing location code rather than writing
16198 a new implementation of symbol_computed_ops. */
16199 *baton
= obstack_alloc (&objfile
->objfile_obstack
,
16200 sizeof (struct dwarf2_locexpr_baton
));
16201 (*baton
)->per_cu
= cu
->per_cu
;
16202 gdb_assert ((*baton
)->per_cu
);
16204 (*baton
)->size
= 2 + cu_header
->addr_size
;
16205 data
= obstack_alloc (&objfile
->objfile_obstack
, (*baton
)->size
);
16206 (*baton
)->data
= data
;
16208 data
[0] = DW_OP_addr
;
16209 store_unsigned_integer (&data
[1], cu_header
->addr_size
,
16210 byte_order
, DW_ADDR (attr
));
16211 data
[cu_header
->addr_size
+ 1] = DW_OP_stack_value
;
16214 case DW_FORM_string
:
16216 case DW_FORM_GNU_str_index
:
16217 case DW_FORM_GNU_strp_alt
:
16218 /* DW_STRING is already allocated on the objfile obstack, point
16220 *bytes
= (gdb_byte
*) DW_STRING (attr
);
16222 case DW_FORM_block1
:
16223 case DW_FORM_block2
:
16224 case DW_FORM_block4
:
16225 case DW_FORM_block
:
16226 case DW_FORM_exprloc
:
16227 blk
= DW_BLOCK (attr
);
16228 if (TYPE_LENGTH (type
) != blk
->size
)
16229 dwarf2_const_value_length_mismatch_complaint (name
, blk
->size
,
16230 TYPE_LENGTH (type
));
16231 *bytes
= blk
->data
;
16234 /* The DW_AT_const_value attributes are supposed to carry the
16235 symbol's value "represented as it would be on the target
16236 architecture." By the time we get here, it's already been
16237 converted to host endianness, so we just need to sign- or
16238 zero-extend it as appropriate. */
16239 case DW_FORM_data1
:
16240 *bytes
= dwarf2_const_value_data (attr
, type
, name
,
16241 obstack
, cu
, value
, 8);
16243 case DW_FORM_data2
:
16244 *bytes
= dwarf2_const_value_data (attr
, type
, name
,
16245 obstack
, cu
, value
, 16);
16247 case DW_FORM_data4
:
16248 *bytes
= dwarf2_const_value_data (attr
, type
, name
,
16249 obstack
, cu
, value
, 32);
16251 case DW_FORM_data8
:
16252 *bytes
= dwarf2_const_value_data (attr
, type
, name
,
16253 obstack
, cu
, value
, 64);
16256 case DW_FORM_sdata
:
16257 *value
= DW_SND (attr
);
16260 case DW_FORM_udata
:
16261 *value
= DW_UNSND (attr
);
16265 complaint (&symfile_complaints
,
16266 _("unsupported const value attribute form: '%s'"),
16267 dwarf_form_name (attr
->form
));
16274 /* Copy constant value from an attribute to a symbol. */
16277 dwarf2_const_value (struct attribute
*attr
, struct symbol
*sym
,
16278 struct dwarf2_cu
*cu
)
16280 struct objfile
*objfile
= cu
->objfile
;
16281 struct comp_unit_head
*cu_header
= &cu
->header
;
16284 struct dwarf2_locexpr_baton
*baton
;
16286 dwarf2_const_value_attr (attr
, SYMBOL_TYPE (sym
),
16287 SYMBOL_PRINT_NAME (sym
),
16288 &objfile
->objfile_obstack
, cu
,
16289 &value
, &bytes
, &baton
);
16293 SYMBOL_COMPUTED_OPS (sym
) = &dwarf2_locexpr_funcs
;
16294 SYMBOL_LOCATION_BATON (sym
) = baton
;
16295 SYMBOL_CLASS (sym
) = LOC_COMPUTED
;
16297 else if (bytes
!= NULL
)
16299 SYMBOL_VALUE_BYTES (sym
) = bytes
;
16300 SYMBOL_CLASS (sym
) = LOC_CONST_BYTES
;
16304 SYMBOL_VALUE (sym
) = value
;
16305 SYMBOL_CLASS (sym
) = LOC_CONST
;
16309 /* Return the type of the die in question using its DW_AT_type attribute. */
16311 static struct type
*
16312 die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16314 struct attribute
*type_attr
;
16316 type_attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
16319 /* A missing DW_AT_type represents a void type. */
16320 return objfile_type (cu
->objfile
)->builtin_void
;
16323 return lookup_die_type (die
, type_attr
, cu
);
16326 /* True iff CU's producer generates GNAT Ada auxiliary information
16327 that allows to find parallel types through that information instead
16328 of having to do expensive parallel lookups by type name. */
16331 need_gnat_info (struct dwarf2_cu
*cu
)
16333 /* FIXME: brobecker/2010-10-12: As of now, only the AdaCore version
16334 of GNAT produces this auxiliary information, without any indication
16335 that it is produced. Part of enhancing the FSF version of GNAT
16336 to produce that information will be to put in place an indicator
16337 that we can use in order to determine whether the descriptive type
16338 info is available or not. One suggestion that has been made is
16339 to use a new attribute, attached to the CU die. For now, assume
16340 that the descriptive type info is not available. */
16344 /* Return the auxiliary type of the die in question using its
16345 DW_AT_GNAT_descriptive_type attribute. Returns NULL if the
16346 attribute is not present. */
16348 static struct type
*
16349 die_descriptive_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16351 struct attribute
*type_attr
;
16353 type_attr
= dwarf2_attr (die
, DW_AT_GNAT_descriptive_type
, cu
);
16357 return lookup_die_type (die
, type_attr
, cu
);
16360 /* If DIE has a descriptive_type attribute, then set the TYPE's
16361 descriptive type accordingly. */
16364 set_descriptive_type (struct type
*type
, struct die_info
*die
,
16365 struct dwarf2_cu
*cu
)
16367 struct type
*descriptive_type
= die_descriptive_type (die
, cu
);
16369 if (descriptive_type
)
16371 ALLOCATE_GNAT_AUX_TYPE (type
);
16372 TYPE_DESCRIPTIVE_TYPE (type
) = descriptive_type
;
16376 /* Return the containing type of the die in question using its
16377 DW_AT_containing_type attribute. */
16379 static struct type
*
16380 die_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16382 struct attribute
*type_attr
;
16384 type_attr
= dwarf2_attr (die
, DW_AT_containing_type
, cu
);
16386 error (_("Dwarf Error: Problem turning containing type into gdb type "
16387 "[in module %s]"), cu
->objfile
->name
);
16389 return lookup_die_type (die
, type_attr
, cu
);
16392 /* Look up the type of DIE in CU using its type attribute ATTR.
16393 If there is no type substitute an error marker. */
16395 static struct type
*
16396 lookup_die_type (struct die_info
*die
, struct attribute
*attr
,
16397 struct dwarf2_cu
*cu
)
16399 struct objfile
*objfile
= cu
->objfile
;
16400 struct type
*this_type
;
16402 /* First see if we have it cached. */
16404 if (attr
->form
== DW_FORM_GNU_ref_alt
)
16406 struct dwarf2_per_cu_data
*per_cu
;
16407 sect_offset offset
= dwarf2_get_ref_die_offset (attr
);
16409 per_cu
= dwarf2_find_containing_comp_unit (offset
, 1, cu
->objfile
);
16410 this_type
= get_die_type_at_offset (offset
, per_cu
);
16412 else if (is_ref_attr (attr
))
16414 sect_offset offset
= dwarf2_get_ref_die_offset (attr
);
16416 this_type
= get_die_type_at_offset (offset
, cu
->per_cu
);
16418 else if (attr
->form
== DW_FORM_ref_sig8
)
16420 struct signatured_type
*sig_type
= DW_SIGNATURED_TYPE (attr
);
16422 /* sig_type will be NULL if the signatured type is missing from
16424 if (sig_type
== NULL
)
16425 error (_("Dwarf Error: Cannot find signatured DIE referenced from DIE "
16426 "at 0x%x [in module %s]"),
16427 die
->offset
.sect_off
, objfile
->name
);
16429 gdb_assert (sig_type
->per_cu
.is_debug_types
);
16430 /* If we haven't filled in type_offset_in_section yet, then we
16431 haven't read the type in yet. */
16433 if (sig_type
->type_offset_in_section
.sect_off
!= 0)
16436 get_die_type_at_offset (sig_type
->type_offset_in_section
,
16437 &sig_type
->per_cu
);
16442 dump_die_for_error (die
);
16443 error (_("Dwarf Error: Bad type attribute %s [in module %s]"),
16444 dwarf_attr_name (attr
->name
), objfile
->name
);
16447 /* If not cached we need to read it in. */
16449 if (this_type
== NULL
)
16451 struct die_info
*type_die
;
16452 struct dwarf2_cu
*type_cu
= cu
;
16454 type_die
= follow_die_ref_or_sig (die
, attr
, &type_cu
);
16455 /* If we found the type now, it's probably because the type came
16456 from an inter-CU reference and the type's CU got expanded before
16458 this_type
= get_die_type (type_die
, type_cu
);
16459 if (this_type
== NULL
)
16460 this_type
= read_type_die_1 (type_die
, type_cu
);
16463 /* If we still don't have a type use an error marker. */
16465 if (this_type
== NULL
)
16467 char *message
, *saved
;
16469 /* read_type_die already issued a complaint. */
16470 message
= xstrprintf (_("<unknown type in %s, CU 0x%x, DIE 0x%x>"),
16472 cu
->header
.offset
.sect_off
,
16473 die
->offset
.sect_off
);
16474 saved
= obstack_copy0 (&objfile
->objfile_obstack
,
16475 message
, strlen (message
));
16478 this_type
= init_type (TYPE_CODE_ERROR
, 0, 0, saved
, objfile
);
16484 /* Return the type in DIE, CU.
16485 Returns NULL for invalid types.
16487 This first does a lookup in the appropriate type_hash table,
16488 and only reads the die in if necessary.
16490 NOTE: This can be called when reading in partial or full symbols. */
16492 static struct type
*
16493 read_type_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
16495 struct type
*this_type
;
16497 this_type
= get_die_type (die
, cu
);
16501 return read_type_die_1 (die
, cu
);
16504 /* Read the type in DIE, CU.
16505 Returns NULL for invalid types. */
16507 static struct type
*
16508 read_type_die_1 (struct die_info
*die
, struct dwarf2_cu
*cu
)
16510 struct type
*this_type
= NULL
;
16514 case DW_TAG_class_type
:
16515 case DW_TAG_interface_type
:
16516 case DW_TAG_structure_type
:
16517 case DW_TAG_union_type
:
16518 this_type
= read_structure_type (die
, cu
);
16520 case DW_TAG_enumeration_type
:
16521 this_type
= read_enumeration_type (die
, cu
);
16523 case DW_TAG_subprogram
:
16524 case DW_TAG_subroutine_type
:
16525 case DW_TAG_inlined_subroutine
:
16526 this_type
= read_subroutine_type (die
, cu
);
16528 case DW_TAG_array_type
:
16529 this_type
= read_array_type (die
, cu
);
16531 case DW_TAG_set_type
:
16532 this_type
= read_set_type (die
, cu
);
16534 case DW_TAG_pointer_type
:
16535 this_type
= read_tag_pointer_type (die
, cu
);
16537 case DW_TAG_ptr_to_member_type
:
16538 this_type
= read_tag_ptr_to_member_type (die
, cu
);
16540 case DW_TAG_reference_type
:
16541 this_type
= read_tag_reference_type (die
, cu
);
16543 case DW_TAG_const_type
:
16544 this_type
= read_tag_const_type (die
, cu
);
16546 case DW_TAG_volatile_type
:
16547 this_type
= read_tag_volatile_type (die
, cu
);
16549 case DW_TAG_restrict_type
:
16550 this_type
= read_tag_restrict_type (die
, cu
);
16552 case DW_TAG_string_type
:
16553 this_type
= read_tag_string_type (die
, cu
);
16555 case DW_TAG_typedef
:
16556 this_type
= read_typedef (die
, cu
);
16558 case DW_TAG_subrange_type
:
16559 this_type
= read_subrange_type (die
, cu
);
16561 case DW_TAG_base_type
:
16562 this_type
= read_base_type (die
, cu
);
16564 case DW_TAG_unspecified_type
:
16565 this_type
= read_unspecified_type (die
, cu
);
16567 case DW_TAG_namespace
:
16568 this_type
= read_namespace_type (die
, cu
);
16570 case DW_TAG_module
:
16571 this_type
= read_module_type (die
, cu
);
16574 complaint (&symfile_complaints
,
16575 _("unexpected tag in read_type_die: '%s'"),
16576 dwarf_tag_name (die
->tag
));
16583 /* See if we can figure out if the class lives in a namespace. We do
16584 this by looking for a member function; its demangled name will
16585 contain namespace info, if there is any.
16586 Return the computed name or NULL.
16587 Space for the result is allocated on the objfile's obstack.
16588 This is the full-die version of guess_partial_die_structure_name.
16589 In this case we know DIE has no useful parent. */
16592 guess_full_die_structure_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
16594 struct die_info
*spec_die
;
16595 struct dwarf2_cu
*spec_cu
;
16596 struct die_info
*child
;
16599 spec_die
= die_specification (die
, &spec_cu
);
16600 if (spec_die
!= NULL
)
16606 for (child
= die
->child
;
16608 child
= child
->sibling
)
16610 if (child
->tag
== DW_TAG_subprogram
)
16612 struct attribute
*attr
;
16614 attr
= dwarf2_attr (child
, DW_AT_linkage_name
, cu
);
16616 attr
= dwarf2_attr (child
, DW_AT_MIPS_linkage_name
, cu
);
16620 = language_class_name_from_physname (cu
->language_defn
,
16624 if (actual_name
!= NULL
)
16626 const char *die_name
= dwarf2_name (die
, cu
);
16628 if (die_name
!= NULL
16629 && strcmp (die_name
, actual_name
) != 0)
16631 /* Strip off the class name from the full name.
16632 We want the prefix. */
16633 int die_name_len
= strlen (die_name
);
16634 int actual_name_len
= strlen (actual_name
);
16636 /* Test for '::' as a sanity check. */
16637 if (actual_name_len
> die_name_len
+ 2
16638 && actual_name
[actual_name_len
16639 - die_name_len
- 1] == ':')
16641 obstack_copy0 (&cu
->objfile
->objfile_obstack
,
16643 actual_name_len
- die_name_len
- 2);
16646 xfree (actual_name
);
16655 /* GCC might emit a nameless typedef that has a linkage name. Determine the
16656 prefix part in such case. See
16657 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
16660 anonymous_struct_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
16662 struct attribute
*attr
;
16665 if (die
->tag
!= DW_TAG_class_type
&& die
->tag
!= DW_TAG_interface_type
16666 && die
->tag
!= DW_TAG_structure_type
&& die
->tag
!= DW_TAG_union_type
)
16669 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
16670 if (attr
!= NULL
&& DW_STRING (attr
) != NULL
)
16673 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
16675 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
16676 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
16679 /* dwarf2_name had to be already called. */
16680 gdb_assert (DW_STRING_IS_CANONICAL (attr
));
16682 /* Strip the base name, keep any leading namespaces/classes. */
16683 base
= strrchr (DW_STRING (attr
), ':');
16684 if (base
== NULL
|| base
== DW_STRING (attr
) || base
[-1] != ':')
16687 return obstack_copy0 (&cu
->objfile
->objfile_obstack
,
16688 DW_STRING (attr
), &base
[-1] - DW_STRING (attr
));
16691 /* Return the name of the namespace/class that DIE is defined within,
16692 or "" if we can't tell. The caller should not xfree the result.
16694 For example, if we're within the method foo() in the following
16704 then determine_prefix on foo's die will return "N::C". */
16706 static const char *
16707 determine_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
16709 struct die_info
*parent
, *spec_die
;
16710 struct dwarf2_cu
*spec_cu
;
16711 struct type
*parent_type
;
16714 if (cu
->language
!= language_cplus
&& cu
->language
!= language_java
16715 && cu
->language
!= language_fortran
)
16718 retval
= anonymous_struct_prefix (die
, cu
);
16722 /* We have to be careful in the presence of DW_AT_specification.
16723 For example, with GCC 3.4, given the code
16727 // Definition of N::foo.
16731 then we'll have a tree of DIEs like this:
16733 1: DW_TAG_compile_unit
16734 2: DW_TAG_namespace // N
16735 3: DW_TAG_subprogram // declaration of N::foo
16736 4: DW_TAG_subprogram // definition of N::foo
16737 DW_AT_specification // refers to die #3
16739 Thus, when processing die #4, we have to pretend that we're in
16740 the context of its DW_AT_specification, namely the contex of die
16743 spec_die
= die_specification (die
, &spec_cu
);
16744 if (spec_die
== NULL
)
16745 parent
= die
->parent
;
16748 parent
= spec_die
->parent
;
16752 if (parent
== NULL
)
16754 else if (parent
->building_fullname
)
16757 const char *parent_name
;
16759 /* It has been seen on RealView 2.2 built binaries,
16760 DW_TAG_template_type_param types actually _defined_ as
16761 children of the parent class:
16764 template class <class Enum> Class{};
16765 Class<enum E> class_e;
16767 1: DW_TAG_class_type (Class)
16768 2: DW_TAG_enumeration_type (E)
16769 3: DW_TAG_enumerator (enum1:0)
16770 3: DW_TAG_enumerator (enum2:1)
16772 2: DW_TAG_template_type_param
16773 DW_AT_type DW_FORM_ref_udata (E)
16775 Besides being broken debug info, it can put GDB into an
16776 infinite loop. Consider:
16778 When we're building the full name for Class<E>, we'll start
16779 at Class, and go look over its template type parameters,
16780 finding E. We'll then try to build the full name of E, and
16781 reach here. We're now trying to build the full name of E,
16782 and look over the parent DIE for containing scope. In the
16783 broken case, if we followed the parent DIE of E, we'd again
16784 find Class, and once again go look at its template type
16785 arguments, etc., etc. Simply don't consider such parent die
16786 as source-level parent of this die (it can't be, the language
16787 doesn't allow it), and break the loop here. */
16788 name
= dwarf2_name (die
, cu
);
16789 parent_name
= dwarf2_name (parent
, cu
);
16790 complaint (&symfile_complaints
,
16791 _("template param type '%s' defined within parent '%s'"),
16792 name
? name
: "<unknown>",
16793 parent_name
? parent_name
: "<unknown>");
16797 switch (parent
->tag
)
16799 case DW_TAG_namespace
:
16800 parent_type
= read_type_die (parent
, cu
);
16801 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
16802 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
16803 Work around this problem here. */
16804 if (cu
->language
== language_cplus
16805 && strcmp (TYPE_TAG_NAME (parent_type
), "::") == 0)
16807 /* We give a name to even anonymous namespaces. */
16808 return TYPE_TAG_NAME (parent_type
);
16809 case DW_TAG_class_type
:
16810 case DW_TAG_interface_type
:
16811 case DW_TAG_structure_type
:
16812 case DW_TAG_union_type
:
16813 case DW_TAG_module
:
16814 parent_type
= read_type_die (parent
, cu
);
16815 if (TYPE_TAG_NAME (parent_type
) != NULL
)
16816 return TYPE_TAG_NAME (parent_type
);
16818 /* An anonymous structure is only allowed non-static data
16819 members; no typedefs, no member functions, et cetera.
16820 So it does not need a prefix. */
16822 case DW_TAG_compile_unit
:
16823 case DW_TAG_partial_unit
:
16824 /* gcc-4.5 -gdwarf-4 can drop the enclosing namespace. Cope. */
16825 if (cu
->language
== language_cplus
16826 && !VEC_empty (dwarf2_section_info_def
, dwarf2_per_objfile
->types
)
16827 && die
->child
!= NULL
16828 && (die
->tag
== DW_TAG_class_type
16829 || die
->tag
== DW_TAG_structure_type
16830 || die
->tag
== DW_TAG_union_type
))
16832 char *name
= guess_full_die_structure_name (die
, cu
);
16838 return determine_prefix (parent
, cu
);
16842 /* Return a newly-allocated string formed by concatenating PREFIX and SUFFIX
16843 with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then
16844 simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null, perform
16845 an obconcat, otherwise allocate storage for the result. The CU argument is
16846 used to determine the language and hence, the appropriate separator. */
16848 #define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */
16851 typename_concat (struct obstack
*obs
, const char *prefix
, const char *suffix
,
16852 int physname
, struct dwarf2_cu
*cu
)
16854 const char *lead
= "";
16857 if (suffix
== NULL
|| suffix
[0] == '\0'
16858 || prefix
== NULL
|| prefix
[0] == '\0')
16860 else if (cu
->language
== language_java
)
16862 else if (cu
->language
== language_fortran
&& physname
)
16864 /* This is gfortran specific mangling. Normally DW_AT_linkage_name or
16865 DW_AT_MIPS_linkage_name is preferred and used instead. */
16873 if (prefix
== NULL
)
16875 if (suffix
== NULL
)
16881 = xmalloc (strlen (prefix
) + MAX_SEP_LEN
+ strlen (suffix
) + 1);
16883 strcpy (retval
, lead
);
16884 strcat (retval
, prefix
);
16885 strcat (retval
, sep
);
16886 strcat (retval
, suffix
);
16891 /* We have an obstack. */
16892 return obconcat (obs
, lead
, prefix
, sep
, suffix
, (char *) NULL
);
16896 /* Return sibling of die, NULL if no sibling. */
16898 static struct die_info
*
16899 sibling_die (struct die_info
*die
)
16901 return die
->sibling
;
16904 /* Get name of a die, return NULL if not found. */
16906 static const char *
16907 dwarf2_canonicalize_name (const char *name
, struct dwarf2_cu
*cu
,
16908 struct obstack
*obstack
)
16910 if (name
&& cu
->language
== language_cplus
)
16912 char *canon_name
= cp_canonicalize_string (name
);
16914 if (canon_name
!= NULL
)
16916 if (strcmp (canon_name
, name
) != 0)
16917 name
= obstack_copy0 (obstack
, canon_name
, strlen (canon_name
));
16918 xfree (canon_name
);
16925 /* Get name of a die, return NULL if not found. */
16927 static const char *
16928 dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
16930 struct attribute
*attr
;
16932 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
16933 if ((!attr
|| !DW_STRING (attr
))
16934 && die
->tag
!= DW_TAG_class_type
16935 && die
->tag
!= DW_TAG_interface_type
16936 && die
->tag
!= DW_TAG_structure_type
16937 && die
->tag
!= DW_TAG_union_type
)
16942 case DW_TAG_compile_unit
:
16943 case DW_TAG_partial_unit
:
16944 /* Compilation units have a DW_AT_name that is a filename, not
16945 a source language identifier. */
16946 case DW_TAG_enumeration_type
:
16947 case DW_TAG_enumerator
:
16948 /* These tags always have simple identifiers already; no need
16949 to canonicalize them. */
16950 return DW_STRING (attr
);
16952 case DW_TAG_subprogram
:
16953 /* Java constructors will all be named "<init>", so return
16954 the class name when we see this special case. */
16955 if (cu
->language
== language_java
16956 && DW_STRING (attr
) != NULL
16957 && strcmp (DW_STRING (attr
), "<init>") == 0)
16959 struct dwarf2_cu
*spec_cu
= cu
;
16960 struct die_info
*spec_die
;
16962 /* GCJ will output '<init>' for Java constructor names.
16963 For this special case, return the name of the parent class. */
16965 /* GCJ may output suprogram DIEs with AT_specification set.
16966 If so, use the name of the specified DIE. */
16967 spec_die
= die_specification (die
, &spec_cu
);
16968 if (spec_die
!= NULL
)
16969 return dwarf2_name (spec_die
, spec_cu
);
16974 if (die
->tag
== DW_TAG_class_type
)
16975 return dwarf2_name (die
, cu
);
16977 while (die
->tag
!= DW_TAG_compile_unit
16978 && die
->tag
!= DW_TAG_partial_unit
);
16982 case DW_TAG_class_type
:
16983 case DW_TAG_interface_type
:
16984 case DW_TAG_structure_type
:
16985 case DW_TAG_union_type
:
16986 /* Some GCC versions emit spurious DW_AT_name attributes for unnamed
16987 structures or unions. These were of the form "._%d" in GCC 4.1,
16988 or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3
16989 and GCC 4.4. We work around this problem by ignoring these. */
16990 if (attr
&& DW_STRING (attr
)
16991 && (strncmp (DW_STRING (attr
), "._", 2) == 0
16992 || strncmp (DW_STRING (attr
), "<anonymous", 10) == 0))
16995 /* GCC might emit a nameless typedef that has a linkage name. See
16996 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
16997 if (!attr
|| DW_STRING (attr
) == NULL
)
16999 char *demangled
= NULL
;
17001 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
17003 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
17005 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
17008 /* Avoid demangling DW_STRING (attr) the second time on a second
17009 call for the same DIE. */
17010 if (!DW_STRING_IS_CANONICAL (attr
))
17011 demangled
= cplus_demangle (DW_STRING (attr
), DMGL_TYPES
);
17017 /* FIXME: we already did this for the partial symbol... */
17018 DW_STRING (attr
) = obstack_copy0 (&cu
->objfile
->objfile_obstack
,
17019 demangled
, strlen (demangled
));
17020 DW_STRING_IS_CANONICAL (attr
) = 1;
17023 /* Strip any leading namespaces/classes, keep only the base name.
17024 DW_AT_name for named DIEs does not contain the prefixes. */
17025 base
= strrchr (DW_STRING (attr
), ':');
17026 if (base
&& base
> DW_STRING (attr
) && base
[-1] == ':')
17029 return DW_STRING (attr
);
17038 if (!DW_STRING_IS_CANONICAL (attr
))
17041 = dwarf2_canonicalize_name (DW_STRING (attr
), cu
,
17042 &cu
->objfile
->objfile_obstack
);
17043 DW_STRING_IS_CANONICAL (attr
) = 1;
17045 return DW_STRING (attr
);
17048 /* Return the die that this die in an extension of, or NULL if there
17049 is none. *EXT_CU is the CU containing DIE on input, and the CU
17050 containing the return value on output. */
17052 static struct die_info
*
17053 dwarf2_extension (struct die_info
*die
, struct dwarf2_cu
**ext_cu
)
17055 struct attribute
*attr
;
17057 attr
= dwarf2_attr (die
, DW_AT_extension
, *ext_cu
);
17061 return follow_die_ref (die
, attr
, ext_cu
);
17064 /* Convert a DIE tag into its string name. */
17066 static const char *
17067 dwarf_tag_name (unsigned tag
)
17069 const char *name
= get_DW_TAG_name (tag
);
17072 return "DW_TAG_<unknown>";
17077 /* Convert a DWARF attribute code into its string name. */
17079 static const char *
17080 dwarf_attr_name (unsigned attr
)
17084 #ifdef MIPS /* collides with DW_AT_HP_block_index */
17085 if (attr
== DW_AT_MIPS_fde
)
17086 return "DW_AT_MIPS_fde";
17088 if (attr
== DW_AT_HP_block_index
)
17089 return "DW_AT_HP_block_index";
17092 name
= get_DW_AT_name (attr
);
17095 return "DW_AT_<unknown>";
17100 /* Convert a DWARF value form code into its string name. */
17102 static const char *
17103 dwarf_form_name (unsigned form
)
17105 const char *name
= get_DW_FORM_name (form
);
17108 return "DW_FORM_<unknown>";
17114 dwarf_bool_name (unsigned mybool
)
17122 /* Convert a DWARF type code into its string name. */
17124 static const char *
17125 dwarf_type_encoding_name (unsigned enc
)
17127 const char *name
= get_DW_ATE_name (enc
);
17130 return "DW_ATE_<unknown>";
17136 dump_die_shallow (struct ui_file
*f
, int indent
, struct die_info
*die
)
17140 print_spaces (indent
, f
);
17141 fprintf_unfiltered (f
, "Die: %s (abbrev %d, offset 0x%x)\n",
17142 dwarf_tag_name (die
->tag
), die
->abbrev
, die
->offset
.sect_off
);
17144 if (die
->parent
!= NULL
)
17146 print_spaces (indent
, f
);
17147 fprintf_unfiltered (f
, " parent at offset: 0x%x\n",
17148 die
->parent
->offset
.sect_off
);
17151 print_spaces (indent
, f
);
17152 fprintf_unfiltered (f
, " has children: %s\n",
17153 dwarf_bool_name (die
->child
!= NULL
));
17155 print_spaces (indent
, f
);
17156 fprintf_unfiltered (f
, " attributes:\n");
17158 for (i
= 0; i
< die
->num_attrs
; ++i
)
17160 print_spaces (indent
, f
);
17161 fprintf_unfiltered (f
, " %s (%s) ",
17162 dwarf_attr_name (die
->attrs
[i
].name
),
17163 dwarf_form_name (die
->attrs
[i
].form
));
17165 switch (die
->attrs
[i
].form
)
17168 case DW_FORM_GNU_addr_index
:
17169 fprintf_unfiltered (f
, "address: ");
17170 fputs_filtered (hex_string (DW_ADDR (&die
->attrs
[i
])), f
);
17172 case DW_FORM_block2
:
17173 case DW_FORM_block4
:
17174 case DW_FORM_block
:
17175 case DW_FORM_block1
:
17176 fprintf_unfiltered (f
, "block: size %s",
17177 pulongest (DW_BLOCK (&die
->attrs
[i
])->size
));
17179 case DW_FORM_exprloc
:
17180 fprintf_unfiltered (f
, "expression: size %s",
17181 pulongest (DW_BLOCK (&die
->attrs
[i
])->size
));
17183 case DW_FORM_ref_addr
:
17184 fprintf_unfiltered (f
, "ref address: ");
17185 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
17187 case DW_FORM_GNU_ref_alt
:
17188 fprintf_unfiltered (f
, "alt ref address: ");
17189 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
17195 case DW_FORM_ref_udata
:
17196 fprintf_unfiltered (f
, "constant ref: 0x%lx (adjusted)",
17197 (long) (DW_UNSND (&die
->attrs
[i
])));
17199 case DW_FORM_data1
:
17200 case DW_FORM_data2
:
17201 case DW_FORM_data4
:
17202 case DW_FORM_data8
:
17203 case DW_FORM_udata
:
17204 case DW_FORM_sdata
:
17205 fprintf_unfiltered (f
, "constant: %s",
17206 pulongest (DW_UNSND (&die
->attrs
[i
])));
17208 case DW_FORM_sec_offset
:
17209 fprintf_unfiltered (f
, "section offset: %s",
17210 pulongest (DW_UNSND (&die
->attrs
[i
])));
17212 case DW_FORM_ref_sig8
:
17213 if (DW_SIGNATURED_TYPE (&die
->attrs
[i
]) != NULL
)
17214 fprintf_unfiltered (f
, "signatured type, offset: 0x%x",
17215 DW_SIGNATURED_TYPE (&die
->attrs
[i
])->per_cu
.offset
.sect_off
);
17217 fprintf_unfiltered (f
, "signatured type, offset: unknown");
17219 case DW_FORM_string
:
17221 case DW_FORM_GNU_str_index
:
17222 case DW_FORM_GNU_strp_alt
:
17223 fprintf_unfiltered (f
, "string: \"%s\" (%s canonicalized)",
17224 DW_STRING (&die
->attrs
[i
])
17225 ? DW_STRING (&die
->attrs
[i
]) : "",
17226 DW_STRING_IS_CANONICAL (&die
->attrs
[i
]) ? "is" : "not");
17229 if (DW_UNSND (&die
->attrs
[i
]))
17230 fprintf_unfiltered (f
, "flag: TRUE");
17232 fprintf_unfiltered (f
, "flag: FALSE");
17234 case DW_FORM_flag_present
:
17235 fprintf_unfiltered (f
, "flag: TRUE");
17237 case DW_FORM_indirect
:
17238 /* The reader will have reduced the indirect form to
17239 the "base form" so this form should not occur. */
17240 fprintf_unfiltered (f
,
17241 "unexpected attribute form: DW_FORM_indirect");
17244 fprintf_unfiltered (f
, "unsupported attribute form: %d.",
17245 die
->attrs
[i
].form
);
17248 fprintf_unfiltered (f
, "\n");
17253 dump_die_for_error (struct die_info
*die
)
17255 dump_die_shallow (gdb_stderr
, 0, die
);
17259 dump_die_1 (struct ui_file
*f
, int level
, int max_level
, struct die_info
*die
)
17261 int indent
= level
* 4;
17263 gdb_assert (die
!= NULL
);
17265 if (level
>= max_level
)
17268 dump_die_shallow (f
, indent
, die
);
17270 if (die
->child
!= NULL
)
17272 print_spaces (indent
, f
);
17273 fprintf_unfiltered (f
, " Children:");
17274 if (level
+ 1 < max_level
)
17276 fprintf_unfiltered (f
, "\n");
17277 dump_die_1 (f
, level
+ 1, max_level
, die
->child
);
17281 fprintf_unfiltered (f
,
17282 " [not printed, max nesting level reached]\n");
17286 if (die
->sibling
!= NULL
&& level
> 0)
17288 dump_die_1 (f
, level
, max_level
, die
->sibling
);
17292 /* This is called from the pdie macro in gdbinit.in.
17293 It's not static so gcc will keep a copy callable from gdb. */
17296 dump_die (struct die_info
*die
, int max_level
)
17298 dump_die_1 (gdb_stdlog
, 0, max_level
, die
);
17302 store_in_ref_table (struct die_info
*die
, struct dwarf2_cu
*cu
)
17306 slot
= htab_find_slot_with_hash (cu
->die_hash
, die
, die
->offset
.sect_off
,
17312 /* DW_ADDR is always stored already as sect_offset; despite for the forms
17313 besides DW_FORM_ref_addr it is stored as cu_offset in the DWARF file. */
17316 is_ref_attr (struct attribute
*attr
)
17318 switch (attr
->form
)
17320 case DW_FORM_ref_addr
:
17325 case DW_FORM_ref_udata
:
17326 case DW_FORM_GNU_ref_alt
:
17333 /* Return DIE offset of ATTR. Return 0 with complaint if ATTR is not of the
17337 dwarf2_get_ref_die_offset (struct attribute
*attr
)
17339 sect_offset retval
= { DW_UNSND (attr
) };
17341 if (is_ref_attr (attr
))
17344 retval
.sect_off
= 0;
17345 complaint (&symfile_complaints
,
17346 _("unsupported die ref attribute form: '%s'"),
17347 dwarf_form_name (attr
->form
));
17351 /* Return the constant value held by ATTR. Return DEFAULT_VALUE if
17352 * the value held by the attribute is not constant. */
17355 dwarf2_get_attr_constant_value (struct attribute
*attr
, int default_value
)
17357 if (attr
->form
== DW_FORM_sdata
)
17358 return DW_SND (attr
);
17359 else if (attr
->form
== DW_FORM_udata
17360 || attr
->form
== DW_FORM_data1
17361 || attr
->form
== DW_FORM_data2
17362 || attr
->form
== DW_FORM_data4
17363 || attr
->form
== DW_FORM_data8
)
17364 return DW_UNSND (attr
);
17367 complaint (&symfile_complaints
,
17368 _("Attribute value is not a constant (%s)"),
17369 dwarf_form_name (attr
->form
));
17370 return default_value
;
17374 /* Follow reference or signature attribute ATTR of SRC_DIE.
17375 On entry *REF_CU is the CU of SRC_DIE.
17376 On exit *REF_CU is the CU of the result. */
17378 static struct die_info
*
17379 follow_die_ref_or_sig (struct die_info
*src_die
, struct attribute
*attr
,
17380 struct dwarf2_cu
**ref_cu
)
17382 struct die_info
*die
;
17384 if (is_ref_attr (attr
))
17385 die
= follow_die_ref (src_die
, attr
, ref_cu
);
17386 else if (attr
->form
== DW_FORM_ref_sig8
)
17387 die
= follow_die_sig (src_die
, attr
, ref_cu
);
17390 dump_die_for_error (src_die
);
17391 error (_("Dwarf Error: Expected reference attribute [in module %s]"),
17392 (*ref_cu
)->objfile
->name
);
17398 /* Follow reference OFFSET.
17399 On entry *REF_CU is the CU of the source die referencing OFFSET.
17400 On exit *REF_CU is the CU of the result.
17401 Returns NULL if OFFSET is invalid. */
17403 static struct die_info
*
17404 follow_die_offset (sect_offset offset
, int offset_in_dwz
,
17405 struct dwarf2_cu
**ref_cu
)
17407 struct die_info temp_die
;
17408 struct dwarf2_cu
*target_cu
, *cu
= *ref_cu
;
17410 gdb_assert (cu
->per_cu
!= NULL
);
17414 if (cu
->per_cu
->is_debug_types
)
17416 /* .debug_types CUs cannot reference anything outside their CU.
17417 If they need to, they have to reference a signatured type via
17418 DW_FORM_ref_sig8. */
17419 if (! offset_in_cu_p (&cu
->header
, offset
))
17422 else if (offset_in_dwz
!= cu
->per_cu
->is_dwz
17423 || ! offset_in_cu_p (&cu
->header
, offset
))
17425 struct dwarf2_per_cu_data
*per_cu
;
17427 per_cu
= dwarf2_find_containing_comp_unit (offset
, offset_in_dwz
,
17430 /* If necessary, add it to the queue and load its DIEs. */
17431 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
17432 load_full_comp_unit (per_cu
, cu
->language
);
17434 target_cu
= per_cu
->cu
;
17436 else if (cu
->dies
== NULL
)
17438 /* We're loading full DIEs during partial symbol reading. */
17439 gdb_assert (dwarf2_per_objfile
->reading_partial_symbols
);
17440 load_full_comp_unit (cu
->per_cu
, language_minimal
);
17443 *ref_cu
= target_cu
;
17444 temp_die
.offset
= offset
;
17445 return htab_find_with_hash (target_cu
->die_hash
, &temp_die
, offset
.sect_off
);
17448 /* Follow reference attribute ATTR of SRC_DIE.
17449 On entry *REF_CU is the CU of SRC_DIE.
17450 On exit *REF_CU is the CU of the result. */
17452 static struct die_info
*
17453 follow_die_ref (struct die_info
*src_die
, struct attribute
*attr
,
17454 struct dwarf2_cu
**ref_cu
)
17456 sect_offset offset
= dwarf2_get_ref_die_offset (attr
);
17457 struct dwarf2_cu
*cu
= *ref_cu
;
17458 struct die_info
*die
;
17460 die
= follow_die_offset (offset
,
17461 (attr
->form
== DW_FORM_GNU_ref_alt
17462 || cu
->per_cu
->is_dwz
),
17465 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced from DIE "
17466 "at 0x%x [in module %s]"),
17467 offset
.sect_off
, src_die
->offset
.sect_off
, cu
->objfile
->name
);
17472 /* Return DWARF block referenced by DW_AT_location of DIE at OFFSET at PER_CU.
17473 Returned value is intended for DW_OP_call*. Returned
17474 dwarf2_locexpr_baton->data has lifetime of PER_CU->OBJFILE. */
17476 struct dwarf2_locexpr_baton
17477 dwarf2_fetch_die_loc_sect_off (sect_offset offset
,
17478 struct dwarf2_per_cu_data
*per_cu
,
17479 CORE_ADDR (*get_frame_pc
) (void *baton
),
17482 struct dwarf2_cu
*cu
;
17483 struct die_info
*die
;
17484 struct attribute
*attr
;
17485 struct dwarf2_locexpr_baton retval
;
17487 dw2_setup (per_cu
->objfile
);
17489 if (per_cu
->cu
== NULL
)
17493 die
= follow_die_offset (offset
, per_cu
->is_dwz
, &cu
);
17495 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"),
17496 offset
.sect_off
, per_cu
->objfile
->name
);
17498 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
17501 /* DWARF: "If there is no such attribute, then there is no effect.".
17502 DATA is ignored if SIZE is 0. */
17504 retval
.data
= NULL
;
17507 else if (attr_form_is_section_offset (attr
))
17509 struct dwarf2_loclist_baton loclist_baton
;
17510 CORE_ADDR pc
= (*get_frame_pc
) (baton
);
17513 fill_in_loclist_baton (cu
, &loclist_baton
, attr
);
17515 retval
.data
= dwarf2_find_location_expression (&loclist_baton
,
17517 retval
.size
= size
;
17521 if (!attr_form_is_block (attr
))
17522 error (_("Dwarf Error: DIE at 0x%x referenced in module %s "
17523 "is neither DW_FORM_block* nor DW_FORM_exprloc"),
17524 offset
.sect_off
, per_cu
->objfile
->name
);
17526 retval
.data
= DW_BLOCK (attr
)->data
;
17527 retval
.size
= DW_BLOCK (attr
)->size
;
17529 retval
.per_cu
= cu
->per_cu
;
17531 age_cached_comp_units ();
17536 /* Like dwarf2_fetch_die_loc_sect_off, but take a CU
17539 struct dwarf2_locexpr_baton
17540 dwarf2_fetch_die_loc_cu_off (cu_offset offset_in_cu
,
17541 struct dwarf2_per_cu_data
*per_cu
,
17542 CORE_ADDR (*get_frame_pc
) (void *baton
),
17545 sect_offset offset
= { per_cu
->offset
.sect_off
+ offset_in_cu
.cu_off
};
17547 return dwarf2_fetch_die_loc_sect_off (offset
, per_cu
, get_frame_pc
, baton
);
17550 /* Return the type of the DIE at DIE_OFFSET in the CU named by
17554 dwarf2_get_die_type (cu_offset die_offset
,
17555 struct dwarf2_per_cu_data
*per_cu
)
17557 sect_offset die_offset_sect
;
17559 dw2_setup (per_cu
->objfile
);
17561 die_offset_sect
.sect_off
= per_cu
->offset
.sect_off
+ die_offset
.cu_off
;
17562 return get_die_type_at_offset (die_offset_sect
, per_cu
);
17565 /* Follow the signature attribute ATTR in SRC_DIE.
17566 On entry *REF_CU is the CU of SRC_DIE.
17567 On exit *REF_CU is the CU of the result. */
17569 static struct die_info
*
17570 follow_die_sig (struct die_info
*src_die
, struct attribute
*attr
,
17571 struct dwarf2_cu
**ref_cu
)
17573 struct objfile
*objfile
= (*ref_cu
)->objfile
;
17574 struct die_info temp_die
;
17575 struct signatured_type
*sig_type
= DW_SIGNATURED_TYPE (attr
);
17576 struct dwarf2_cu
*sig_cu
;
17577 struct die_info
*die
;
17579 /* sig_type will be NULL if the signatured type is missing from
17581 if (sig_type
== NULL
)
17582 error (_("Dwarf Error: Cannot find signatured DIE referenced from DIE "
17583 "at 0x%x [in module %s]"),
17584 src_die
->offset
.sect_off
, objfile
->name
);
17586 /* If necessary, add it to the queue and load its DIEs. */
17588 if (maybe_queue_comp_unit (*ref_cu
, &sig_type
->per_cu
, language_minimal
))
17589 read_signatured_type (sig_type
);
17591 gdb_assert (sig_type
->per_cu
.cu
!= NULL
);
17593 sig_cu
= sig_type
->per_cu
.cu
;
17594 gdb_assert (sig_type
->type_offset_in_section
.sect_off
!= 0);
17595 temp_die
.offset
= sig_type
->type_offset_in_section
;
17596 die
= htab_find_with_hash (sig_cu
->die_hash
, &temp_die
,
17597 temp_die
.offset
.sect_off
);
17600 /* For .gdb_index version 7 keep track of included TUs.
17601 http://sourceware.org/bugzilla/show_bug.cgi?id=15021. */
17602 if (dwarf2_per_objfile
->index_table
!= NULL
17603 && dwarf2_per_objfile
->index_table
->version
<= 7)
17605 VEC_safe_push (dwarf2_per_cu_ptr
,
17606 (*ref_cu
)->per_cu
->imported_symtabs
,
17614 error (_("Dwarf Error: Cannot find signatured DIE at 0x%x referenced "
17615 "from DIE at 0x%x [in module %s]"),
17616 temp_die
.offset
.sect_off
, src_die
->offset
.sect_off
, objfile
->name
);
17619 /* Given an offset of a signatured type, return its signatured_type. */
17621 static struct signatured_type
*
17622 lookup_signatured_type_at_offset (struct objfile
*objfile
,
17623 struct dwarf2_section_info
*section
,
17624 sect_offset offset
)
17626 gdb_byte
*info_ptr
= section
->buffer
+ offset
.sect_off
;
17627 unsigned int length
, initial_length_size
;
17628 unsigned int sig_offset
;
17629 struct signatured_type find_entry
, *sig_type
;
17631 length
= read_initial_length (objfile
->obfd
, info_ptr
, &initial_length_size
);
17632 sig_offset
= (initial_length_size
17634 + (initial_length_size
== 4 ? 4 : 8) /*debug_abbrev_offset*/
17635 + 1 /*address_size*/);
17636 find_entry
.signature
= bfd_get_64 (objfile
->obfd
, info_ptr
+ sig_offset
);
17637 sig_type
= htab_find (dwarf2_per_objfile
->signatured_types
, &find_entry
);
17639 /* This is only used to lookup previously recorded types.
17640 If we didn't find it, it's our bug. */
17641 gdb_assert (sig_type
!= NULL
);
17642 gdb_assert (offset
.sect_off
== sig_type
->per_cu
.offset
.sect_off
);
17647 /* Load the DIEs associated with type unit PER_CU into memory. */
17650 load_full_type_unit (struct dwarf2_per_cu_data
*per_cu
)
17652 struct signatured_type
*sig_type
;
17654 /* Caller is responsible for ensuring type_unit_groups don't get here. */
17655 gdb_assert (! IS_TYPE_UNIT_GROUP (per_cu
));
17657 /* We have the per_cu, but we need the signatured_type.
17658 Fortunately this is an easy translation. */
17659 gdb_assert (per_cu
->is_debug_types
);
17660 sig_type
= (struct signatured_type
*) per_cu
;
17662 gdb_assert (per_cu
->cu
== NULL
);
17664 read_signatured_type (sig_type
);
17666 gdb_assert (per_cu
->cu
!= NULL
);
17669 /* die_reader_func for read_signatured_type.
17670 This is identical to load_full_comp_unit_reader,
17671 but is kept separate for now. */
17674 read_signatured_type_reader (const struct die_reader_specs
*reader
,
17675 gdb_byte
*info_ptr
,
17676 struct die_info
*comp_unit_die
,
17680 struct dwarf2_cu
*cu
= reader
->cu
;
17682 gdb_assert (cu
->die_hash
== NULL
);
17684 htab_create_alloc_ex (cu
->header
.length
/ 12,
17688 &cu
->comp_unit_obstack
,
17689 hashtab_obstack_allocate
,
17690 dummy_obstack_deallocate
);
17693 comp_unit_die
->child
= read_die_and_siblings (reader
, info_ptr
,
17694 &info_ptr
, comp_unit_die
);
17695 cu
->dies
= comp_unit_die
;
17696 /* comp_unit_die is not stored in die_hash, no need. */
17698 /* We try not to read any attributes in this function, because not
17699 all CUs needed for references have been loaded yet, and symbol
17700 table processing isn't initialized. But we have to set the CU language,
17701 or we won't be able to build types correctly.
17702 Similarly, if we do not read the producer, we can not apply
17703 producer-specific interpretation. */
17704 prepare_one_comp_unit (cu
, cu
->dies
, language_minimal
);
17707 /* Read in a signatured type and build its CU and DIEs.
17708 If the type is a stub for the real type in a DWO file,
17709 read in the real type from the DWO file as well. */
17712 read_signatured_type (struct signatured_type
*sig_type
)
17714 struct dwarf2_per_cu_data
*per_cu
= &sig_type
->per_cu
;
17716 gdb_assert (per_cu
->is_debug_types
);
17717 gdb_assert (per_cu
->cu
== NULL
);
17719 init_cutu_and_read_dies (per_cu
, NULL
, 0, 1,
17720 read_signatured_type_reader
, NULL
);
17723 /* Decode simple location descriptions.
17724 Given a pointer to a dwarf block that defines a location, compute
17725 the location and return the value.
17727 NOTE drow/2003-11-18: This function is called in two situations
17728 now: for the address of static or global variables (partial symbols
17729 only) and for offsets into structures which are expected to be
17730 (more or less) constant. The partial symbol case should go away,
17731 and only the constant case should remain. That will let this
17732 function complain more accurately. A few special modes are allowed
17733 without complaint for global variables (for instance, global
17734 register values and thread-local values).
17736 A location description containing no operations indicates that the
17737 object is optimized out. The return value is 0 for that case.
17738 FIXME drow/2003-11-16: No callers check for this case any more; soon all
17739 callers will only want a very basic result and this can become a
17742 Note that stack[0] is unused except as a default error return. */
17745 decode_locdesc (struct dwarf_block
*blk
, struct dwarf2_cu
*cu
)
17747 struct objfile
*objfile
= cu
->objfile
;
17749 size_t size
= blk
->size
;
17750 gdb_byte
*data
= blk
->data
;
17751 CORE_ADDR stack
[64];
17753 unsigned int bytes_read
, unsnd
;
17759 stack
[++stacki
] = 0;
17798 stack
[++stacki
] = op
- DW_OP_lit0
;
17833 stack
[++stacki
] = op
- DW_OP_reg0
;
17835 dwarf2_complex_location_expr_complaint ();
17839 unsnd
= read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
17841 stack
[++stacki
] = unsnd
;
17843 dwarf2_complex_location_expr_complaint ();
17847 stack
[++stacki
] = read_address (objfile
->obfd
, &data
[i
],
17852 case DW_OP_const1u
:
17853 stack
[++stacki
] = read_1_byte (objfile
->obfd
, &data
[i
]);
17857 case DW_OP_const1s
:
17858 stack
[++stacki
] = read_1_signed_byte (objfile
->obfd
, &data
[i
]);
17862 case DW_OP_const2u
:
17863 stack
[++stacki
] = read_2_bytes (objfile
->obfd
, &data
[i
]);
17867 case DW_OP_const2s
:
17868 stack
[++stacki
] = read_2_signed_bytes (objfile
->obfd
, &data
[i
]);
17872 case DW_OP_const4u
:
17873 stack
[++stacki
] = read_4_bytes (objfile
->obfd
, &data
[i
]);
17877 case DW_OP_const4s
:
17878 stack
[++stacki
] = read_4_signed_bytes (objfile
->obfd
, &data
[i
]);
17882 case DW_OP_const8u
:
17883 stack
[++stacki
] = read_8_bytes (objfile
->obfd
, &data
[i
]);
17888 stack
[++stacki
] = read_unsigned_leb128 (NULL
, (data
+ i
),
17894 stack
[++stacki
] = read_signed_leb128 (NULL
, (data
+ i
), &bytes_read
);
17899 stack
[stacki
+ 1] = stack
[stacki
];
17904 stack
[stacki
- 1] += stack
[stacki
];
17908 case DW_OP_plus_uconst
:
17909 stack
[stacki
] += read_unsigned_leb128 (NULL
, (data
+ i
),
17915 stack
[stacki
- 1] -= stack
[stacki
];
17920 /* If we're not the last op, then we definitely can't encode
17921 this using GDB's address_class enum. This is valid for partial
17922 global symbols, although the variable's address will be bogus
17925 dwarf2_complex_location_expr_complaint ();
17928 case DW_OP_GNU_push_tls_address
:
17929 /* The top of the stack has the offset from the beginning
17930 of the thread control block at which the variable is located. */
17931 /* Nothing should follow this operator, so the top of stack would
17933 /* This is valid for partial global symbols, but the variable's
17934 address will be bogus in the psymtab. Make it always at least
17935 non-zero to not look as a variable garbage collected by linker
17936 which have DW_OP_addr 0. */
17938 dwarf2_complex_location_expr_complaint ();
17942 case DW_OP_GNU_uninit
:
17945 case DW_OP_GNU_addr_index
:
17946 case DW_OP_GNU_const_index
:
17947 stack
[++stacki
] = read_addr_index_from_leb128 (cu
, &data
[i
],
17954 const char *name
= get_DW_OP_name (op
);
17957 complaint (&symfile_complaints
, _("unsupported stack op: '%s'"),
17960 complaint (&symfile_complaints
, _("unsupported stack op: '%02x'"),
17964 return (stack
[stacki
]);
17967 /* Enforce maximum stack depth of SIZE-1 to avoid writing
17968 outside of the allocated space. Also enforce minimum>0. */
17969 if (stacki
>= ARRAY_SIZE (stack
) - 1)
17971 complaint (&symfile_complaints
,
17972 _("location description stack overflow"));
17978 complaint (&symfile_complaints
,
17979 _("location description stack underflow"));
17983 return (stack
[stacki
]);
17986 /* memory allocation interface */
17988 static struct dwarf_block
*
17989 dwarf_alloc_block (struct dwarf2_cu
*cu
)
17991 struct dwarf_block
*blk
;
17993 blk
= (struct dwarf_block
*)
17994 obstack_alloc (&cu
->comp_unit_obstack
, sizeof (struct dwarf_block
));
17998 static struct die_info
*
17999 dwarf_alloc_die (struct dwarf2_cu
*cu
, int num_attrs
)
18001 struct die_info
*die
;
18002 size_t size
= sizeof (struct die_info
);
18005 size
+= (num_attrs
- 1) * sizeof (struct attribute
);
18007 die
= (struct die_info
*) obstack_alloc (&cu
->comp_unit_obstack
, size
);
18008 memset (die
, 0, sizeof (struct die_info
));
18013 /* Macro support. */
18015 /* Return the full name of file number I in *LH's file name table.
18016 Use COMP_DIR as the name of the current directory of the
18017 compilation. The result is allocated using xmalloc; the caller is
18018 responsible for freeing it. */
18020 file_full_name (int file
, struct line_header
*lh
, const char *comp_dir
)
18022 /* Is the file number a valid index into the line header's file name
18023 table? Remember that file numbers start with one, not zero. */
18024 if (1 <= file
&& file
<= lh
->num_file_names
)
18026 struct file_entry
*fe
= &lh
->file_names
[file
- 1];
18028 if (IS_ABSOLUTE_PATH (fe
->name
))
18029 return xstrdup (fe
->name
);
18037 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
18043 dir_len
= strlen (dir
);
18044 full_name
= xmalloc (dir_len
+ 1 + strlen (fe
->name
) + 1);
18045 strcpy (full_name
, dir
);
18046 full_name
[dir_len
] = '/';
18047 strcpy (full_name
+ dir_len
+ 1, fe
->name
);
18051 return xstrdup (fe
->name
);
18056 /* The compiler produced a bogus file number. We can at least
18057 record the macro definitions made in the file, even if we
18058 won't be able to find the file by name. */
18059 char fake_name
[80];
18061 xsnprintf (fake_name
, sizeof (fake_name
),
18062 "<bad macro file number %d>", file
);
18064 complaint (&symfile_complaints
,
18065 _("bad file number in macro information (%d)"),
18068 return xstrdup (fake_name
);
18073 static struct macro_source_file
*
18074 macro_start_file (int file
, int line
,
18075 struct macro_source_file
*current_file
,
18076 const char *comp_dir
,
18077 struct line_header
*lh
, struct objfile
*objfile
)
18079 /* The full name of this source file. */
18080 char *full_name
= file_full_name (file
, lh
, comp_dir
);
18082 /* We don't create a macro table for this compilation unit
18083 at all until we actually get a filename. */
18084 if (! pending_macros
)
18085 pending_macros
= new_macro_table (&objfile
->per_bfd
->storage_obstack
,
18086 objfile
->per_bfd
->macro_cache
);
18088 if (! current_file
)
18090 /* If we have no current file, then this must be the start_file
18091 directive for the compilation unit's main source file. */
18092 current_file
= macro_set_main (pending_macros
, full_name
);
18093 macro_define_special (pending_macros
);
18096 current_file
= macro_include (current_file
, line
, full_name
);
18100 return current_file
;
18104 /* Copy the LEN characters at BUF to a xmalloc'ed block of memory,
18105 followed by a null byte. */
18107 copy_string (const char *buf
, int len
)
18109 char *s
= xmalloc (len
+ 1);
18111 memcpy (s
, buf
, len
);
18117 static const char *
18118 consume_improper_spaces (const char *p
, const char *body
)
18122 complaint (&symfile_complaints
,
18123 _("macro definition contains spaces "
18124 "in formal argument list:\n`%s'"),
18136 parse_macro_definition (struct macro_source_file
*file
, int line
,
18141 /* The body string takes one of two forms. For object-like macro
18142 definitions, it should be:
18144 <macro name> " " <definition>
18146 For function-like macro definitions, it should be:
18148 <macro name> "() " <definition>
18150 <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition>
18152 Spaces may appear only where explicitly indicated, and in the
18155 The Dwarf 2 spec says that an object-like macro's name is always
18156 followed by a space, but versions of GCC around March 2002 omit
18157 the space when the macro's definition is the empty string.
18159 The Dwarf 2 spec says that there should be no spaces between the
18160 formal arguments in a function-like macro's formal argument list,
18161 but versions of GCC around March 2002 include spaces after the
18165 /* Find the extent of the macro name. The macro name is terminated
18166 by either a space or null character (for an object-like macro) or
18167 an opening paren (for a function-like macro). */
18168 for (p
= body
; *p
; p
++)
18169 if (*p
== ' ' || *p
== '(')
18172 if (*p
== ' ' || *p
== '\0')
18174 /* It's an object-like macro. */
18175 int name_len
= p
- body
;
18176 char *name
= copy_string (body
, name_len
);
18177 const char *replacement
;
18180 replacement
= body
+ name_len
+ 1;
18183 dwarf2_macro_malformed_definition_complaint (body
);
18184 replacement
= body
+ name_len
;
18187 macro_define_object (file
, line
, name
, replacement
);
18191 else if (*p
== '(')
18193 /* It's a function-like macro. */
18194 char *name
= copy_string (body
, p
- body
);
18197 char **argv
= xmalloc (argv_size
* sizeof (*argv
));
18201 p
= consume_improper_spaces (p
, body
);
18203 /* Parse the formal argument list. */
18204 while (*p
&& *p
!= ')')
18206 /* Find the extent of the current argument name. */
18207 const char *arg_start
= p
;
18209 while (*p
&& *p
!= ',' && *p
!= ')' && *p
!= ' ')
18212 if (! *p
|| p
== arg_start
)
18213 dwarf2_macro_malformed_definition_complaint (body
);
18216 /* Make sure argv has room for the new argument. */
18217 if (argc
>= argv_size
)
18220 argv
= xrealloc (argv
, argv_size
* sizeof (*argv
));
18223 argv
[argc
++] = copy_string (arg_start
, p
- arg_start
);
18226 p
= consume_improper_spaces (p
, body
);
18228 /* Consume the comma, if present. */
18233 p
= consume_improper_spaces (p
, body
);
18242 /* Perfectly formed definition, no complaints. */
18243 macro_define_function (file
, line
, name
,
18244 argc
, (const char **) argv
,
18246 else if (*p
== '\0')
18248 /* Complain, but do define it. */
18249 dwarf2_macro_malformed_definition_complaint (body
);
18250 macro_define_function (file
, line
, name
,
18251 argc
, (const char **) argv
,
18255 /* Just complain. */
18256 dwarf2_macro_malformed_definition_complaint (body
);
18259 /* Just complain. */
18260 dwarf2_macro_malformed_definition_complaint (body
);
18266 for (i
= 0; i
< argc
; i
++)
18272 dwarf2_macro_malformed_definition_complaint (body
);
18275 /* Skip some bytes from BYTES according to the form given in FORM.
18276 Returns the new pointer. */
18279 skip_form_bytes (bfd
*abfd
, gdb_byte
*bytes
, gdb_byte
*buffer_end
,
18280 enum dwarf_form form
,
18281 unsigned int offset_size
,
18282 struct dwarf2_section_info
*section
)
18284 unsigned int bytes_read
;
18288 case DW_FORM_data1
:
18293 case DW_FORM_data2
:
18297 case DW_FORM_data4
:
18301 case DW_FORM_data8
:
18305 case DW_FORM_string
:
18306 read_direct_string (abfd
, bytes
, &bytes_read
);
18307 bytes
+= bytes_read
;
18310 case DW_FORM_sec_offset
:
18312 case DW_FORM_GNU_strp_alt
:
18313 bytes
+= offset_size
;
18316 case DW_FORM_block
:
18317 bytes
+= read_unsigned_leb128 (abfd
, bytes
, &bytes_read
);
18318 bytes
+= bytes_read
;
18321 case DW_FORM_block1
:
18322 bytes
+= 1 + read_1_byte (abfd
, bytes
);
18324 case DW_FORM_block2
:
18325 bytes
+= 2 + read_2_bytes (abfd
, bytes
);
18327 case DW_FORM_block4
:
18328 bytes
+= 4 + read_4_bytes (abfd
, bytes
);
18331 case DW_FORM_sdata
:
18332 case DW_FORM_udata
:
18333 case DW_FORM_GNU_addr_index
:
18334 case DW_FORM_GNU_str_index
:
18335 bytes
= (gdb_byte
*) gdb_skip_leb128 (bytes
, buffer_end
);
18338 dwarf2_section_buffer_overflow_complaint (section
);
18346 complaint (&symfile_complaints
,
18347 _("invalid form 0x%x in `%s'"),
18349 section
->asection
->name
);
18357 /* A helper for dwarf_decode_macros that handles skipping an unknown
18358 opcode. Returns an updated pointer to the macro data buffer; or,
18359 on error, issues a complaint and returns NULL. */
18362 skip_unknown_opcode (unsigned int opcode
,
18363 gdb_byte
**opcode_definitions
,
18364 gdb_byte
*mac_ptr
, gdb_byte
*mac_end
,
18366 unsigned int offset_size
,
18367 struct dwarf2_section_info
*section
)
18369 unsigned int bytes_read
, i
;
18373 if (opcode_definitions
[opcode
] == NULL
)
18375 complaint (&symfile_complaints
,
18376 _("unrecognized DW_MACFINO opcode 0x%x"),
18381 defn
= opcode_definitions
[opcode
];
18382 arg
= read_unsigned_leb128 (abfd
, defn
, &bytes_read
);
18383 defn
+= bytes_read
;
18385 for (i
= 0; i
< arg
; ++i
)
18387 mac_ptr
= skip_form_bytes (abfd
, mac_ptr
, mac_end
, defn
[i
], offset_size
,
18389 if (mac_ptr
== NULL
)
18391 /* skip_form_bytes already issued the complaint. */
18399 /* A helper function which parses the header of a macro section.
18400 If the macro section is the extended (for now called "GNU") type,
18401 then this updates *OFFSET_SIZE. Returns a pointer to just after
18402 the header, or issues a complaint and returns NULL on error. */
18405 dwarf_parse_macro_header (gdb_byte
**opcode_definitions
,
18408 unsigned int *offset_size
,
18409 int section_is_gnu
)
18411 memset (opcode_definitions
, 0, 256 * sizeof (gdb_byte
*));
18413 if (section_is_gnu
)
18415 unsigned int version
, flags
;
18417 version
= read_2_bytes (abfd
, mac_ptr
);
18420 complaint (&symfile_complaints
,
18421 _("unrecognized version `%d' in .debug_macro section"),
18427 flags
= read_1_byte (abfd
, mac_ptr
);
18429 *offset_size
= (flags
& 1) ? 8 : 4;
18431 if ((flags
& 2) != 0)
18432 /* We don't need the line table offset. */
18433 mac_ptr
+= *offset_size
;
18435 /* Vendor opcode descriptions. */
18436 if ((flags
& 4) != 0)
18438 unsigned int i
, count
;
18440 count
= read_1_byte (abfd
, mac_ptr
);
18442 for (i
= 0; i
< count
; ++i
)
18444 unsigned int opcode
, bytes_read
;
18447 opcode
= read_1_byte (abfd
, mac_ptr
);
18449 opcode_definitions
[opcode
] = mac_ptr
;
18450 arg
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
18451 mac_ptr
+= bytes_read
;
18460 /* A helper for dwarf_decode_macros that handles the GNU extensions,
18461 including DW_MACRO_GNU_transparent_include. */
18464 dwarf_decode_macro_bytes (bfd
*abfd
, gdb_byte
*mac_ptr
, gdb_byte
*mac_end
,
18465 struct macro_source_file
*current_file
,
18466 struct line_header
*lh
, const char *comp_dir
,
18467 struct dwarf2_section_info
*section
,
18468 int section_is_gnu
, int section_is_dwz
,
18469 unsigned int offset_size
,
18470 struct objfile
*objfile
,
18471 htab_t include_hash
)
18473 enum dwarf_macro_record_type macinfo_type
;
18474 int at_commandline
;
18475 gdb_byte
*opcode_definitions
[256];
18477 mac_ptr
= dwarf_parse_macro_header (opcode_definitions
, abfd
, mac_ptr
,
18478 &offset_size
, section_is_gnu
);
18479 if (mac_ptr
== NULL
)
18481 /* We already issued a complaint. */
18485 /* Determines if GDB is still before first DW_MACINFO_start_file. If true
18486 GDB is still reading the definitions from command line. First
18487 DW_MACINFO_start_file will need to be ignored as it was already executed
18488 to create CURRENT_FILE for the main source holding also the command line
18489 definitions. On first met DW_MACINFO_start_file this flag is reset to
18490 normally execute all the remaining DW_MACINFO_start_file macinfos. */
18492 at_commandline
= 1;
18496 /* Do we at least have room for a macinfo type byte? */
18497 if (mac_ptr
>= mac_end
)
18499 dwarf2_section_buffer_overflow_complaint (section
);
18503 macinfo_type
= read_1_byte (abfd
, mac_ptr
);
18506 /* Note that we rely on the fact that the corresponding GNU and
18507 DWARF constants are the same. */
18508 switch (macinfo_type
)
18510 /* A zero macinfo type indicates the end of the macro
18515 case DW_MACRO_GNU_define
:
18516 case DW_MACRO_GNU_undef
:
18517 case DW_MACRO_GNU_define_indirect
:
18518 case DW_MACRO_GNU_undef_indirect
:
18519 case DW_MACRO_GNU_define_indirect_alt
:
18520 case DW_MACRO_GNU_undef_indirect_alt
:
18522 unsigned int bytes_read
;
18527 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
18528 mac_ptr
+= bytes_read
;
18530 if (macinfo_type
== DW_MACRO_GNU_define
18531 || macinfo_type
== DW_MACRO_GNU_undef
)
18533 body
= read_direct_string (abfd
, mac_ptr
, &bytes_read
);
18534 mac_ptr
+= bytes_read
;
18538 LONGEST str_offset
;
18540 str_offset
= read_offset_1 (abfd
, mac_ptr
, offset_size
);
18541 mac_ptr
+= offset_size
;
18543 if (macinfo_type
== DW_MACRO_GNU_define_indirect_alt
18544 || macinfo_type
== DW_MACRO_GNU_undef_indirect_alt
18547 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
18549 body
= read_indirect_string_from_dwz (dwz
, str_offset
);
18552 body
= read_indirect_string_at_offset (abfd
, str_offset
);
18555 is_define
= (macinfo_type
== DW_MACRO_GNU_define
18556 || macinfo_type
== DW_MACRO_GNU_define_indirect
18557 || macinfo_type
== DW_MACRO_GNU_define_indirect_alt
);
18558 if (! current_file
)
18560 /* DWARF violation as no main source is present. */
18561 complaint (&symfile_complaints
,
18562 _("debug info with no main source gives macro %s "
18564 is_define
? _("definition") : _("undefinition"),
18568 if ((line
== 0 && !at_commandline
)
18569 || (line
!= 0 && at_commandline
))
18570 complaint (&symfile_complaints
,
18571 _("debug info gives %s macro %s with %s line %d: %s"),
18572 at_commandline
? _("command-line") : _("in-file"),
18573 is_define
? _("definition") : _("undefinition"),
18574 line
== 0 ? _("zero") : _("non-zero"), line
, body
);
18577 parse_macro_definition (current_file
, line
, body
);
18580 gdb_assert (macinfo_type
== DW_MACRO_GNU_undef
18581 || macinfo_type
== DW_MACRO_GNU_undef_indirect
18582 || macinfo_type
== DW_MACRO_GNU_undef_indirect_alt
);
18583 macro_undef (current_file
, line
, body
);
18588 case DW_MACRO_GNU_start_file
:
18590 unsigned int bytes_read
;
18593 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
18594 mac_ptr
+= bytes_read
;
18595 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
18596 mac_ptr
+= bytes_read
;
18598 if ((line
== 0 && !at_commandline
)
18599 || (line
!= 0 && at_commandline
))
18600 complaint (&symfile_complaints
,
18601 _("debug info gives source %d included "
18602 "from %s at %s line %d"),
18603 file
, at_commandline
? _("command-line") : _("file"),
18604 line
== 0 ? _("zero") : _("non-zero"), line
);
18606 if (at_commandline
)
18608 /* This DW_MACRO_GNU_start_file was executed in the
18610 at_commandline
= 0;
18613 current_file
= macro_start_file (file
, line
,
18614 current_file
, comp_dir
,
18619 case DW_MACRO_GNU_end_file
:
18620 if (! current_file
)
18621 complaint (&symfile_complaints
,
18622 _("macro debug info has an unmatched "
18623 "`close_file' directive"));
18626 current_file
= current_file
->included_by
;
18627 if (! current_file
)
18629 enum dwarf_macro_record_type next_type
;
18631 /* GCC circa March 2002 doesn't produce the zero
18632 type byte marking the end of the compilation
18633 unit. Complain if it's not there, but exit no
18636 /* Do we at least have room for a macinfo type byte? */
18637 if (mac_ptr
>= mac_end
)
18639 dwarf2_section_buffer_overflow_complaint (section
);
18643 /* We don't increment mac_ptr here, so this is just
18645 next_type
= read_1_byte (abfd
, mac_ptr
);
18646 if (next_type
!= 0)
18647 complaint (&symfile_complaints
,
18648 _("no terminating 0-type entry for "
18649 "macros in `.debug_macinfo' section"));
18656 case DW_MACRO_GNU_transparent_include
:
18657 case DW_MACRO_GNU_transparent_include_alt
:
18661 bfd
*include_bfd
= abfd
;
18662 struct dwarf2_section_info
*include_section
= section
;
18663 struct dwarf2_section_info alt_section
;
18664 gdb_byte
*include_mac_end
= mac_end
;
18665 int is_dwz
= section_is_dwz
;
18666 gdb_byte
*new_mac_ptr
;
18668 offset
= read_offset_1 (abfd
, mac_ptr
, offset_size
);
18669 mac_ptr
+= offset_size
;
18671 if (macinfo_type
== DW_MACRO_GNU_transparent_include_alt
)
18673 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
18675 dwarf2_read_section (dwarf2_per_objfile
->objfile
,
18678 include_bfd
= dwz
->macro
.asection
->owner
;
18679 include_section
= &dwz
->macro
;
18680 include_mac_end
= dwz
->macro
.buffer
+ dwz
->macro
.size
;
18684 new_mac_ptr
= include_section
->buffer
+ offset
;
18685 slot
= htab_find_slot (include_hash
, new_mac_ptr
, INSERT
);
18689 /* This has actually happened; see
18690 http://sourceware.org/bugzilla/show_bug.cgi?id=13568. */
18691 complaint (&symfile_complaints
,
18692 _("recursive DW_MACRO_GNU_transparent_include in "
18693 ".debug_macro section"));
18697 *slot
= new_mac_ptr
;
18699 dwarf_decode_macro_bytes (include_bfd
, new_mac_ptr
,
18700 include_mac_end
, current_file
,
18702 section
, section_is_gnu
, is_dwz
,
18703 offset_size
, objfile
, include_hash
);
18705 htab_remove_elt (include_hash
, new_mac_ptr
);
18710 case DW_MACINFO_vendor_ext
:
18711 if (!section_is_gnu
)
18713 unsigned int bytes_read
;
18716 constant
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
18717 mac_ptr
+= bytes_read
;
18718 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
18719 mac_ptr
+= bytes_read
;
18721 /* We don't recognize any vendor extensions. */
18727 mac_ptr
= skip_unknown_opcode (macinfo_type
, opcode_definitions
,
18728 mac_ptr
, mac_end
, abfd
, offset_size
,
18730 if (mac_ptr
== NULL
)
18734 } while (macinfo_type
!= 0);
18738 dwarf_decode_macros (struct dwarf2_cu
*cu
, unsigned int offset
,
18739 const char *comp_dir
, int section_is_gnu
)
18741 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18742 struct line_header
*lh
= cu
->line_header
;
18744 gdb_byte
*mac_ptr
, *mac_end
;
18745 struct macro_source_file
*current_file
= 0;
18746 enum dwarf_macro_record_type macinfo_type
;
18747 unsigned int offset_size
= cu
->header
.offset_size
;
18748 gdb_byte
*opcode_definitions
[256];
18749 struct cleanup
*cleanup
;
18750 htab_t include_hash
;
18752 struct dwarf2_section_info
*section
;
18753 const char *section_name
;
18755 if (cu
->dwo_unit
!= NULL
)
18757 if (section_is_gnu
)
18759 section
= &cu
->dwo_unit
->dwo_file
->sections
.macro
;
18760 section_name
= ".debug_macro.dwo";
18764 section
= &cu
->dwo_unit
->dwo_file
->sections
.macinfo
;
18765 section_name
= ".debug_macinfo.dwo";
18770 if (section_is_gnu
)
18772 section
= &dwarf2_per_objfile
->macro
;
18773 section_name
= ".debug_macro";
18777 section
= &dwarf2_per_objfile
->macinfo
;
18778 section_name
= ".debug_macinfo";
18782 dwarf2_read_section (objfile
, section
);
18783 if (section
->buffer
== NULL
)
18785 complaint (&symfile_complaints
, _("missing %s section"), section_name
);
18788 abfd
= section
->asection
->owner
;
18790 /* First pass: Find the name of the base filename.
18791 This filename is needed in order to process all macros whose definition
18792 (or undefinition) comes from the command line. These macros are defined
18793 before the first DW_MACINFO_start_file entry, and yet still need to be
18794 associated to the base file.
18796 To determine the base file name, we scan the macro definitions until we
18797 reach the first DW_MACINFO_start_file entry. We then initialize
18798 CURRENT_FILE accordingly so that any macro definition found before the
18799 first DW_MACINFO_start_file can still be associated to the base file. */
18801 mac_ptr
= section
->buffer
+ offset
;
18802 mac_end
= section
->buffer
+ section
->size
;
18804 mac_ptr
= dwarf_parse_macro_header (opcode_definitions
, abfd
, mac_ptr
,
18805 &offset_size
, section_is_gnu
);
18806 if (mac_ptr
== NULL
)
18808 /* We already issued a complaint. */
18814 /* Do we at least have room for a macinfo type byte? */
18815 if (mac_ptr
>= mac_end
)
18817 /* Complaint is printed during the second pass as GDB will probably
18818 stop the first pass earlier upon finding
18819 DW_MACINFO_start_file. */
18823 macinfo_type
= read_1_byte (abfd
, mac_ptr
);
18826 /* Note that we rely on the fact that the corresponding GNU and
18827 DWARF constants are the same. */
18828 switch (macinfo_type
)
18830 /* A zero macinfo type indicates the end of the macro
18835 case DW_MACRO_GNU_define
:
18836 case DW_MACRO_GNU_undef
:
18837 /* Only skip the data by MAC_PTR. */
18839 unsigned int bytes_read
;
18841 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
18842 mac_ptr
+= bytes_read
;
18843 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
18844 mac_ptr
+= bytes_read
;
18848 case DW_MACRO_GNU_start_file
:
18850 unsigned int bytes_read
;
18853 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
18854 mac_ptr
+= bytes_read
;
18855 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
18856 mac_ptr
+= bytes_read
;
18858 current_file
= macro_start_file (file
, line
, current_file
,
18859 comp_dir
, lh
, objfile
);
18863 case DW_MACRO_GNU_end_file
:
18864 /* No data to skip by MAC_PTR. */
18867 case DW_MACRO_GNU_define_indirect
:
18868 case DW_MACRO_GNU_undef_indirect
:
18869 case DW_MACRO_GNU_define_indirect_alt
:
18870 case DW_MACRO_GNU_undef_indirect_alt
:
18872 unsigned int bytes_read
;
18874 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
18875 mac_ptr
+= bytes_read
;
18876 mac_ptr
+= offset_size
;
18880 case DW_MACRO_GNU_transparent_include
:
18881 case DW_MACRO_GNU_transparent_include_alt
:
18882 /* Note that, according to the spec, a transparent include
18883 chain cannot call DW_MACRO_GNU_start_file. So, we can just
18884 skip this opcode. */
18885 mac_ptr
+= offset_size
;
18888 case DW_MACINFO_vendor_ext
:
18889 /* Only skip the data by MAC_PTR. */
18890 if (!section_is_gnu
)
18892 unsigned int bytes_read
;
18894 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
18895 mac_ptr
+= bytes_read
;
18896 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
18897 mac_ptr
+= bytes_read
;
18902 mac_ptr
= skip_unknown_opcode (macinfo_type
, opcode_definitions
,
18903 mac_ptr
, mac_end
, abfd
, offset_size
,
18905 if (mac_ptr
== NULL
)
18909 } while (macinfo_type
!= 0 && current_file
== NULL
);
18911 /* Second pass: Process all entries.
18913 Use the AT_COMMAND_LINE flag to determine whether we are still processing
18914 command-line macro definitions/undefinitions. This flag is unset when we
18915 reach the first DW_MACINFO_start_file entry. */
18917 include_hash
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
18918 NULL
, xcalloc
, xfree
);
18919 cleanup
= make_cleanup_htab_delete (include_hash
);
18920 mac_ptr
= section
->buffer
+ offset
;
18921 slot
= htab_find_slot (include_hash
, mac_ptr
, INSERT
);
18923 dwarf_decode_macro_bytes (abfd
, mac_ptr
, mac_end
,
18924 current_file
, lh
, comp_dir
, section
,
18926 offset_size
, objfile
, include_hash
);
18927 do_cleanups (cleanup
);
18930 /* Check if the attribute's form is a DW_FORM_block*
18931 if so return true else false. */
18934 attr_form_is_block (struct attribute
*attr
)
18936 return (attr
== NULL
? 0 :
18937 attr
->form
== DW_FORM_block1
18938 || attr
->form
== DW_FORM_block2
18939 || attr
->form
== DW_FORM_block4
18940 || attr
->form
== DW_FORM_block
18941 || attr
->form
== DW_FORM_exprloc
);
18944 /* Return non-zero if ATTR's value is a section offset --- classes
18945 lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise.
18946 You may use DW_UNSND (attr) to retrieve such offsets.
18948 Section 7.5.4, "Attribute Encodings", explains that no attribute
18949 may have a value that belongs to more than one of these classes; it
18950 would be ambiguous if we did, because we use the same forms for all
18954 attr_form_is_section_offset (struct attribute
*attr
)
18956 return (attr
->form
== DW_FORM_data4
18957 || attr
->form
== DW_FORM_data8
18958 || attr
->form
== DW_FORM_sec_offset
);
18961 /* Return non-zero if ATTR's value falls in the 'constant' class, or
18962 zero otherwise. When this function returns true, you can apply
18963 dwarf2_get_attr_constant_value to it.
18965 However, note that for some attributes you must check
18966 attr_form_is_section_offset before using this test. DW_FORM_data4
18967 and DW_FORM_data8 are members of both the constant class, and of
18968 the classes that contain offsets into other debug sections
18969 (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says
18970 that, if an attribute's can be either a constant or one of the
18971 section offset classes, DW_FORM_data4 and DW_FORM_data8 should be
18972 taken as section offsets, not constants. */
18975 attr_form_is_constant (struct attribute
*attr
)
18977 switch (attr
->form
)
18979 case DW_FORM_sdata
:
18980 case DW_FORM_udata
:
18981 case DW_FORM_data1
:
18982 case DW_FORM_data2
:
18983 case DW_FORM_data4
:
18984 case DW_FORM_data8
:
18991 /* Return the .debug_loc section to use for CU.
18992 For DWO files use .debug_loc.dwo. */
18994 static struct dwarf2_section_info
*
18995 cu_debug_loc_section (struct dwarf2_cu
*cu
)
18998 return &cu
->dwo_unit
->dwo_file
->sections
.loc
;
18999 return &dwarf2_per_objfile
->loc
;
19002 /* A helper function that fills in a dwarf2_loclist_baton. */
19005 fill_in_loclist_baton (struct dwarf2_cu
*cu
,
19006 struct dwarf2_loclist_baton
*baton
,
19007 struct attribute
*attr
)
19009 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
19011 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
19013 baton
->per_cu
= cu
->per_cu
;
19014 gdb_assert (baton
->per_cu
);
19015 /* We don't know how long the location list is, but make sure we
19016 don't run off the edge of the section. */
19017 baton
->size
= section
->size
- DW_UNSND (attr
);
19018 baton
->data
= section
->buffer
+ DW_UNSND (attr
);
19019 baton
->base_address
= cu
->base_address
;
19020 baton
->from_dwo
= cu
->dwo_unit
!= NULL
;
19024 dwarf2_symbol_mark_computed (struct attribute
*attr
, struct symbol
*sym
,
19025 struct dwarf2_cu
*cu
)
19027 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
19028 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
19030 if (attr_form_is_section_offset (attr
)
19031 /* .debug_loc{,.dwo} may not exist at all, or the offset may be outside
19032 the section. If so, fall through to the complaint in the
19034 && DW_UNSND (attr
) < dwarf2_section_size (objfile
, section
))
19036 struct dwarf2_loclist_baton
*baton
;
19038 baton
= obstack_alloc (&objfile
->objfile_obstack
,
19039 sizeof (struct dwarf2_loclist_baton
));
19041 fill_in_loclist_baton (cu
, baton
, attr
);
19043 if (cu
->base_known
== 0)
19044 complaint (&symfile_complaints
,
19045 _("Location list used without "
19046 "specifying the CU base address."));
19048 SYMBOL_COMPUTED_OPS (sym
) = &dwarf2_loclist_funcs
;
19049 SYMBOL_LOCATION_BATON (sym
) = baton
;
19053 struct dwarf2_locexpr_baton
*baton
;
19055 baton
= obstack_alloc (&objfile
->objfile_obstack
,
19056 sizeof (struct dwarf2_locexpr_baton
));
19057 baton
->per_cu
= cu
->per_cu
;
19058 gdb_assert (baton
->per_cu
);
19060 if (attr_form_is_block (attr
))
19062 /* Note that we're just copying the block's data pointer
19063 here, not the actual data. We're still pointing into the
19064 info_buffer for SYM's objfile; right now we never release
19065 that buffer, but when we do clean up properly this may
19067 baton
->size
= DW_BLOCK (attr
)->size
;
19068 baton
->data
= DW_BLOCK (attr
)->data
;
19072 dwarf2_invalid_attrib_class_complaint ("location description",
19073 SYMBOL_NATURAL_NAME (sym
));
19077 SYMBOL_COMPUTED_OPS (sym
) = &dwarf2_locexpr_funcs
;
19078 SYMBOL_LOCATION_BATON (sym
) = baton
;
19082 /* Return the OBJFILE associated with the compilation unit CU. If CU
19083 came from a separate debuginfo file, then the master objfile is
19087 dwarf2_per_cu_objfile (struct dwarf2_per_cu_data
*per_cu
)
19089 struct objfile
*objfile
= per_cu
->objfile
;
19091 /* Return the master objfile, so that we can report and look up the
19092 correct file containing this variable. */
19093 if (objfile
->separate_debug_objfile_backlink
)
19094 objfile
= objfile
->separate_debug_objfile_backlink
;
19099 /* Return comp_unit_head for PER_CU, either already available in PER_CU->CU
19100 (CU_HEADERP is unused in such case) or prepare a temporary copy at
19101 CU_HEADERP first. */
19103 static const struct comp_unit_head
*
19104 per_cu_header_read_in (struct comp_unit_head
*cu_headerp
,
19105 struct dwarf2_per_cu_data
*per_cu
)
19107 gdb_byte
*info_ptr
;
19110 return &per_cu
->cu
->header
;
19112 info_ptr
= per_cu
->info_or_types_section
->buffer
+ per_cu
->offset
.sect_off
;
19114 memset (cu_headerp
, 0, sizeof (*cu_headerp
));
19115 read_comp_unit_head (cu_headerp
, info_ptr
, per_cu
->objfile
->obfd
);
19120 /* Return the address size given in the compilation unit header for CU. */
19123 dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data
*per_cu
)
19125 struct comp_unit_head cu_header_local
;
19126 const struct comp_unit_head
*cu_headerp
;
19128 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
19130 return cu_headerp
->addr_size
;
19133 /* Return the offset size given in the compilation unit header for CU. */
19136 dwarf2_per_cu_offset_size (struct dwarf2_per_cu_data
*per_cu
)
19138 struct comp_unit_head cu_header_local
;
19139 const struct comp_unit_head
*cu_headerp
;
19141 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
19143 return cu_headerp
->offset_size
;
19146 /* See its dwarf2loc.h declaration. */
19149 dwarf2_per_cu_ref_addr_size (struct dwarf2_per_cu_data
*per_cu
)
19151 struct comp_unit_head cu_header_local
;
19152 const struct comp_unit_head
*cu_headerp
;
19154 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
19156 if (cu_headerp
->version
== 2)
19157 return cu_headerp
->addr_size
;
19159 return cu_headerp
->offset_size
;
19162 /* Return the text offset of the CU. The returned offset comes from
19163 this CU's objfile. If this objfile came from a separate debuginfo
19164 file, then the offset may be different from the corresponding
19165 offset in the parent objfile. */
19168 dwarf2_per_cu_text_offset (struct dwarf2_per_cu_data
*per_cu
)
19170 struct objfile
*objfile
= per_cu
->objfile
;
19172 return ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
19175 /* Locate the .debug_info compilation unit from CU's objfile which contains
19176 the DIE at OFFSET. Raises an error on failure. */
19178 static struct dwarf2_per_cu_data
*
19179 dwarf2_find_containing_comp_unit (sect_offset offset
,
19180 unsigned int offset_in_dwz
,
19181 struct objfile
*objfile
)
19183 struct dwarf2_per_cu_data
*this_cu
;
19185 const sect_offset
*cu_off
;
19188 high
= dwarf2_per_objfile
->n_comp_units
- 1;
19191 struct dwarf2_per_cu_data
*mid_cu
;
19192 int mid
= low
+ (high
- low
) / 2;
19194 mid_cu
= dwarf2_per_objfile
->all_comp_units
[mid
];
19195 cu_off
= &mid_cu
->offset
;
19196 if (mid_cu
->is_dwz
> offset_in_dwz
19197 || (mid_cu
->is_dwz
== offset_in_dwz
19198 && cu_off
->sect_off
>= offset
.sect_off
))
19203 gdb_assert (low
== high
);
19204 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
19205 cu_off
= &this_cu
->offset
;
19206 if (this_cu
->is_dwz
!= offset_in_dwz
|| cu_off
->sect_off
> offset
.sect_off
)
19208 if (low
== 0 || this_cu
->is_dwz
!= offset_in_dwz
)
19209 error (_("Dwarf Error: could not find partial DIE containing "
19210 "offset 0x%lx [in module %s]"),
19211 (long) offset
.sect_off
, bfd_get_filename (objfile
->obfd
));
19213 gdb_assert (dwarf2_per_objfile
->all_comp_units
[low
-1]->offset
.sect_off
19214 <= offset
.sect_off
);
19215 return dwarf2_per_objfile
->all_comp_units
[low
-1];
19219 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
19220 if (low
== dwarf2_per_objfile
->n_comp_units
- 1
19221 && offset
.sect_off
>= this_cu
->offset
.sect_off
+ this_cu
->length
)
19222 error (_("invalid dwarf2 offset %u"), offset
.sect_off
);
19223 gdb_assert (offset
.sect_off
< this_cu
->offset
.sect_off
+ this_cu
->length
);
19228 /* Initialize dwarf2_cu CU, owned by PER_CU. */
19231 init_one_comp_unit (struct dwarf2_cu
*cu
, struct dwarf2_per_cu_data
*per_cu
)
19233 memset (cu
, 0, sizeof (*cu
));
19235 cu
->per_cu
= per_cu
;
19236 cu
->objfile
= per_cu
->objfile
;
19237 obstack_init (&cu
->comp_unit_obstack
);
19240 /* Initialize basic fields of dwarf_cu CU according to DIE COMP_UNIT_DIE. */
19243 prepare_one_comp_unit (struct dwarf2_cu
*cu
, struct die_info
*comp_unit_die
,
19244 enum language pretend_language
)
19246 struct attribute
*attr
;
19248 /* Set the language we're debugging. */
19249 attr
= dwarf2_attr (comp_unit_die
, DW_AT_language
, cu
);
19251 set_cu_language (DW_UNSND (attr
), cu
);
19254 cu
->language
= pretend_language
;
19255 cu
->language_defn
= language_def (cu
->language
);
19258 attr
= dwarf2_attr (comp_unit_die
, DW_AT_producer
, cu
);
19260 cu
->producer
= DW_STRING (attr
);
19263 /* Release one cached compilation unit, CU. We unlink it from the tree
19264 of compilation units, but we don't remove it from the read_in_chain;
19265 the caller is responsible for that.
19266 NOTE: DATA is a void * because this function is also used as a
19267 cleanup routine. */
19270 free_heap_comp_unit (void *data
)
19272 struct dwarf2_cu
*cu
= data
;
19274 gdb_assert (cu
->per_cu
!= NULL
);
19275 cu
->per_cu
->cu
= NULL
;
19278 obstack_free (&cu
->comp_unit_obstack
, NULL
);
19283 /* This cleanup function is passed the address of a dwarf2_cu on the stack
19284 when we're finished with it. We can't free the pointer itself, but be
19285 sure to unlink it from the cache. Also release any associated storage. */
19288 free_stack_comp_unit (void *data
)
19290 struct dwarf2_cu
*cu
= data
;
19292 gdb_assert (cu
->per_cu
!= NULL
);
19293 cu
->per_cu
->cu
= NULL
;
19296 obstack_free (&cu
->comp_unit_obstack
, NULL
);
19297 cu
->partial_dies
= NULL
;
19300 /* Free all cached compilation units. */
19303 free_cached_comp_units (void *data
)
19305 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
19307 per_cu
= dwarf2_per_objfile
->read_in_chain
;
19308 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
19309 while (per_cu
!= NULL
)
19311 struct dwarf2_per_cu_data
*next_cu
;
19313 next_cu
= per_cu
->cu
->read_in_chain
;
19315 free_heap_comp_unit (per_cu
->cu
);
19316 *last_chain
= next_cu
;
19322 /* Increase the age counter on each cached compilation unit, and free
19323 any that are too old. */
19326 age_cached_comp_units (void)
19328 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
19330 dwarf2_clear_marks (dwarf2_per_objfile
->read_in_chain
);
19331 per_cu
= dwarf2_per_objfile
->read_in_chain
;
19332 while (per_cu
!= NULL
)
19334 per_cu
->cu
->last_used
++;
19335 if (per_cu
->cu
->last_used
<= dwarf2_max_cache_age
)
19336 dwarf2_mark (per_cu
->cu
);
19337 per_cu
= per_cu
->cu
->read_in_chain
;
19340 per_cu
= dwarf2_per_objfile
->read_in_chain
;
19341 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
19342 while (per_cu
!= NULL
)
19344 struct dwarf2_per_cu_data
*next_cu
;
19346 next_cu
= per_cu
->cu
->read_in_chain
;
19348 if (!per_cu
->cu
->mark
)
19350 free_heap_comp_unit (per_cu
->cu
);
19351 *last_chain
= next_cu
;
19354 last_chain
= &per_cu
->cu
->read_in_chain
;
19360 /* Remove a single compilation unit from the cache. */
19363 free_one_cached_comp_unit (struct dwarf2_per_cu_data
*target_per_cu
)
19365 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
19367 per_cu
= dwarf2_per_objfile
->read_in_chain
;
19368 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
19369 while (per_cu
!= NULL
)
19371 struct dwarf2_per_cu_data
*next_cu
;
19373 next_cu
= per_cu
->cu
->read_in_chain
;
19375 if (per_cu
== target_per_cu
)
19377 free_heap_comp_unit (per_cu
->cu
);
19379 *last_chain
= next_cu
;
19383 last_chain
= &per_cu
->cu
->read_in_chain
;
19389 /* Release all extra memory associated with OBJFILE. */
19392 dwarf2_free_objfile (struct objfile
*objfile
)
19394 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
19396 if (dwarf2_per_objfile
== NULL
)
19399 /* Cached DIE trees use xmalloc and the comp_unit_obstack. */
19400 free_cached_comp_units (NULL
);
19402 if (dwarf2_per_objfile
->quick_file_names_table
)
19403 htab_delete (dwarf2_per_objfile
->quick_file_names_table
);
19405 /* Everything else should be on the objfile obstack. */
19408 /* A set of CU "per_cu" pointer, DIE offset, and GDB type pointer.
19409 We store these in a hash table separate from the DIEs, and preserve them
19410 when the DIEs are flushed out of cache.
19412 The CU "per_cu" pointer is needed because offset alone is not enough to
19413 uniquely identify the type. A file may have multiple .debug_types sections,
19414 or the type may come from a DWO file. We have to use something in
19415 dwarf2_per_cu_data (or the pointer to it) because we can enter the lookup
19416 routine, get_die_type_at_offset, from outside this file, and thus won't
19417 necessarily have PER_CU->cu. Fortunately, PER_CU is stable for the life
19420 struct dwarf2_per_cu_offset_and_type
19422 const struct dwarf2_per_cu_data
*per_cu
;
19423 sect_offset offset
;
19427 /* Hash function for a dwarf2_per_cu_offset_and_type. */
19430 per_cu_offset_and_type_hash (const void *item
)
19432 const struct dwarf2_per_cu_offset_and_type
*ofs
= item
;
19434 return (uintptr_t) ofs
->per_cu
+ ofs
->offset
.sect_off
;
19437 /* Equality function for a dwarf2_per_cu_offset_and_type. */
19440 per_cu_offset_and_type_eq (const void *item_lhs
, const void *item_rhs
)
19442 const struct dwarf2_per_cu_offset_and_type
*ofs_lhs
= item_lhs
;
19443 const struct dwarf2_per_cu_offset_and_type
*ofs_rhs
= item_rhs
;
19445 return (ofs_lhs
->per_cu
== ofs_rhs
->per_cu
19446 && ofs_lhs
->offset
.sect_off
== ofs_rhs
->offset
.sect_off
);
19449 /* Set the type associated with DIE to TYPE. Save it in CU's hash
19450 table if necessary. For convenience, return TYPE.
19452 The DIEs reading must have careful ordering to:
19453 * Not cause infite loops trying to read in DIEs as a prerequisite for
19454 reading current DIE.
19455 * Not trying to dereference contents of still incompletely read in types
19456 while reading in other DIEs.
19457 * Enable referencing still incompletely read in types just by a pointer to
19458 the type without accessing its fields.
19460 Therefore caller should follow these rules:
19461 * Try to fetch any prerequisite types we may need to build this DIE type
19462 before building the type and calling set_die_type.
19463 * After building type call set_die_type for current DIE as soon as
19464 possible before fetching more types to complete the current type.
19465 * Make the type as complete as possible before fetching more types. */
19467 static struct type
*
19468 set_die_type (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
19470 struct dwarf2_per_cu_offset_and_type
**slot
, ofs
;
19471 struct objfile
*objfile
= cu
->objfile
;
19473 /* For Ada types, make sure that the gnat-specific data is always
19474 initialized (if not already set). There are a few types where
19475 we should not be doing so, because the type-specific area is
19476 already used to hold some other piece of info (eg: TYPE_CODE_FLT
19477 where the type-specific area is used to store the floatformat).
19478 But this is not a problem, because the gnat-specific information
19479 is actually not needed for these types. */
19480 if (need_gnat_info (cu
)
19481 && TYPE_CODE (type
) != TYPE_CODE_FUNC
19482 && TYPE_CODE (type
) != TYPE_CODE_FLT
19483 && !HAVE_GNAT_AUX_INFO (type
))
19484 INIT_GNAT_SPECIFIC (type
);
19486 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
19488 dwarf2_per_objfile
->die_type_hash
=
19489 htab_create_alloc_ex (127,
19490 per_cu_offset_and_type_hash
,
19491 per_cu_offset_and_type_eq
,
19493 &objfile
->objfile_obstack
,
19494 hashtab_obstack_allocate
,
19495 dummy_obstack_deallocate
);
19498 ofs
.per_cu
= cu
->per_cu
;
19499 ofs
.offset
= die
->offset
;
19501 slot
= (struct dwarf2_per_cu_offset_and_type
**)
19502 htab_find_slot (dwarf2_per_objfile
->die_type_hash
, &ofs
, INSERT
);
19504 complaint (&symfile_complaints
,
19505 _("A problem internal to GDB: DIE 0x%x has type already set"),
19506 die
->offset
.sect_off
);
19507 *slot
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (**slot
));
19512 /* Look up the type for the die at OFFSET in the appropriate type_hash
19513 table, or return NULL if the die does not have a saved type. */
19515 static struct type
*
19516 get_die_type_at_offset (sect_offset offset
,
19517 struct dwarf2_per_cu_data
*per_cu
)
19519 struct dwarf2_per_cu_offset_and_type
*slot
, ofs
;
19521 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
19524 ofs
.per_cu
= per_cu
;
19525 ofs
.offset
= offset
;
19526 slot
= htab_find (dwarf2_per_objfile
->die_type_hash
, &ofs
);
19533 /* Look up the type for DIE in the appropriate type_hash table,
19534 or return NULL if DIE does not have a saved type. */
19536 static struct type
*
19537 get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
19539 return get_die_type_at_offset (die
->offset
, cu
->per_cu
);
19542 /* Add a dependence relationship from CU to REF_PER_CU. */
19545 dwarf2_add_dependence (struct dwarf2_cu
*cu
,
19546 struct dwarf2_per_cu_data
*ref_per_cu
)
19550 if (cu
->dependencies
== NULL
)
19552 = htab_create_alloc_ex (5, htab_hash_pointer
, htab_eq_pointer
,
19553 NULL
, &cu
->comp_unit_obstack
,
19554 hashtab_obstack_allocate
,
19555 dummy_obstack_deallocate
);
19557 slot
= htab_find_slot (cu
->dependencies
, ref_per_cu
, INSERT
);
19559 *slot
= ref_per_cu
;
19562 /* Subroutine of dwarf2_mark to pass to htab_traverse.
19563 Set the mark field in every compilation unit in the
19564 cache that we must keep because we are keeping CU. */
19567 dwarf2_mark_helper (void **slot
, void *data
)
19569 struct dwarf2_per_cu_data
*per_cu
;
19571 per_cu
= (struct dwarf2_per_cu_data
*) *slot
;
19573 /* cu->dependencies references may not yet have been ever read if QUIT aborts
19574 reading of the chain. As such dependencies remain valid it is not much
19575 useful to track and undo them during QUIT cleanups. */
19576 if (per_cu
->cu
== NULL
)
19579 if (per_cu
->cu
->mark
)
19581 per_cu
->cu
->mark
= 1;
19583 if (per_cu
->cu
->dependencies
!= NULL
)
19584 htab_traverse (per_cu
->cu
->dependencies
, dwarf2_mark_helper
, NULL
);
19589 /* Set the mark field in CU and in every other compilation unit in the
19590 cache that we must keep because we are keeping CU. */
19593 dwarf2_mark (struct dwarf2_cu
*cu
)
19598 if (cu
->dependencies
!= NULL
)
19599 htab_traverse (cu
->dependencies
, dwarf2_mark_helper
, NULL
);
19603 dwarf2_clear_marks (struct dwarf2_per_cu_data
*per_cu
)
19607 per_cu
->cu
->mark
= 0;
19608 per_cu
= per_cu
->cu
->read_in_chain
;
19612 /* Trivial hash function for partial_die_info: the hash value of a DIE
19613 is its offset in .debug_info for this objfile. */
19616 partial_die_hash (const void *item
)
19618 const struct partial_die_info
*part_die
= item
;
19620 return part_die
->offset
.sect_off
;
19623 /* Trivial comparison function for partial_die_info structures: two DIEs
19624 are equal if they have the same offset. */
19627 partial_die_eq (const void *item_lhs
, const void *item_rhs
)
19629 const struct partial_die_info
*part_die_lhs
= item_lhs
;
19630 const struct partial_die_info
*part_die_rhs
= item_rhs
;
19632 return part_die_lhs
->offset
.sect_off
== part_die_rhs
->offset
.sect_off
;
19635 static struct cmd_list_element
*set_dwarf2_cmdlist
;
19636 static struct cmd_list_element
*show_dwarf2_cmdlist
;
19639 set_dwarf2_cmd (char *args
, int from_tty
)
19641 help_list (set_dwarf2_cmdlist
, "maintenance set dwarf2 ", -1, gdb_stdout
);
19645 show_dwarf2_cmd (char *args
, int from_tty
)
19647 cmd_show_list (show_dwarf2_cmdlist
, from_tty
, "");
19650 /* Free data associated with OBJFILE, if necessary. */
19653 dwarf2_per_objfile_free (struct objfile
*objfile
, void *d
)
19655 struct dwarf2_per_objfile
*data
= d
;
19658 for (ix
= 0; ix
< dwarf2_per_objfile
->n_comp_units
; ++ix
)
19659 VEC_free (dwarf2_per_cu_ptr
,
19660 dwarf2_per_objfile
->all_comp_units
[ix
]->imported_symtabs
);
19662 for (ix
= 0; ix
< dwarf2_per_objfile
->n_type_units
; ++ix
)
19663 VEC_free (dwarf2_per_cu_ptr
,
19664 dwarf2_per_objfile
->all_type_units
[ix
]->per_cu
.imported_symtabs
);
19666 VEC_free (dwarf2_section_info_def
, data
->types
);
19668 if (data
->dwo_files
)
19669 free_dwo_files (data
->dwo_files
, objfile
);
19671 if (data
->dwz_file
&& data
->dwz_file
->dwz_bfd
)
19672 gdb_bfd_unref (data
->dwz_file
->dwz_bfd
);
19676 /* The "save gdb-index" command. */
19678 /* The contents of the hash table we create when building the string
19680 struct strtab_entry
19682 offset_type offset
;
19686 /* Hash function for a strtab_entry.
19688 Function is used only during write_hash_table so no index format backward
19689 compatibility is needed. */
19692 hash_strtab_entry (const void *e
)
19694 const struct strtab_entry
*entry
= e
;
19695 return mapped_index_string_hash (INT_MAX
, entry
->str
);
19698 /* Equality function for a strtab_entry. */
19701 eq_strtab_entry (const void *a
, const void *b
)
19703 const struct strtab_entry
*ea
= a
;
19704 const struct strtab_entry
*eb
= b
;
19705 return !strcmp (ea
->str
, eb
->str
);
19708 /* Create a strtab_entry hash table. */
19711 create_strtab (void)
19713 return htab_create_alloc (100, hash_strtab_entry
, eq_strtab_entry
,
19714 xfree
, xcalloc
, xfree
);
19717 /* Add a string to the constant pool. Return the string's offset in
19721 add_string (htab_t table
, struct obstack
*cpool
, const char *str
)
19724 struct strtab_entry entry
;
19725 struct strtab_entry
*result
;
19728 slot
= htab_find_slot (table
, &entry
, INSERT
);
19733 result
= XNEW (struct strtab_entry
);
19734 result
->offset
= obstack_object_size (cpool
);
19736 obstack_grow_str0 (cpool
, str
);
19739 return result
->offset
;
19742 /* An entry in the symbol table. */
19743 struct symtab_index_entry
19745 /* The name of the symbol. */
19747 /* The offset of the name in the constant pool. */
19748 offset_type index_offset
;
19749 /* A sorted vector of the indices of all the CUs that hold an object
19751 VEC (offset_type
) *cu_indices
;
19754 /* The symbol table. This is a power-of-2-sized hash table. */
19755 struct mapped_symtab
19757 offset_type n_elements
;
19759 struct symtab_index_entry
**data
;
19762 /* Hash function for a symtab_index_entry. */
19765 hash_symtab_entry (const void *e
)
19767 const struct symtab_index_entry
*entry
= e
;
19768 return iterative_hash (VEC_address (offset_type
, entry
->cu_indices
),
19769 sizeof (offset_type
) * VEC_length (offset_type
,
19770 entry
->cu_indices
),
19774 /* Equality function for a symtab_index_entry. */
19777 eq_symtab_entry (const void *a
, const void *b
)
19779 const struct symtab_index_entry
*ea
= a
;
19780 const struct symtab_index_entry
*eb
= b
;
19781 int len
= VEC_length (offset_type
, ea
->cu_indices
);
19782 if (len
!= VEC_length (offset_type
, eb
->cu_indices
))
19784 return !memcmp (VEC_address (offset_type
, ea
->cu_indices
),
19785 VEC_address (offset_type
, eb
->cu_indices
),
19786 sizeof (offset_type
) * len
);
19789 /* Destroy a symtab_index_entry. */
19792 delete_symtab_entry (void *p
)
19794 struct symtab_index_entry
*entry
= p
;
19795 VEC_free (offset_type
, entry
->cu_indices
);
19799 /* Create a hash table holding symtab_index_entry objects. */
19802 create_symbol_hash_table (void)
19804 return htab_create_alloc (100, hash_symtab_entry
, eq_symtab_entry
,
19805 delete_symtab_entry
, xcalloc
, xfree
);
19808 /* Create a new mapped symtab object. */
19810 static struct mapped_symtab
*
19811 create_mapped_symtab (void)
19813 struct mapped_symtab
*symtab
= XNEW (struct mapped_symtab
);
19814 symtab
->n_elements
= 0;
19815 symtab
->size
= 1024;
19816 symtab
->data
= XCNEWVEC (struct symtab_index_entry
*, symtab
->size
);
19820 /* Destroy a mapped_symtab. */
19823 cleanup_mapped_symtab (void *p
)
19825 struct mapped_symtab
*symtab
= p
;
19826 /* The contents of the array are freed when the other hash table is
19828 xfree (symtab
->data
);
19832 /* Find a slot in SYMTAB for the symbol NAME. Returns a pointer to
19835 Function is used only during write_hash_table so no index format backward
19836 compatibility is needed. */
19838 static struct symtab_index_entry
**
19839 find_slot (struct mapped_symtab
*symtab
, const char *name
)
19841 offset_type index
, step
, hash
= mapped_index_string_hash (INT_MAX
, name
);
19843 index
= hash
& (symtab
->size
- 1);
19844 step
= ((hash
* 17) & (symtab
->size
- 1)) | 1;
19848 if (!symtab
->data
[index
] || !strcmp (name
, symtab
->data
[index
]->name
))
19849 return &symtab
->data
[index
];
19850 index
= (index
+ step
) & (symtab
->size
- 1);
19854 /* Expand SYMTAB's hash table. */
19857 hash_expand (struct mapped_symtab
*symtab
)
19859 offset_type old_size
= symtab
->size
;
19861 struct symtab_index_entry
**old_entries
= symtab
->data
;
19864 symtab
->data
= XCNEWVEC (struct symtab_index_entry
*, symtab
->size
);
19866 for (i
= 0; i
< old_size
; ++i
)
19868 if (old_entries
[i
])
19870 struct symtab_index_entry
**slot
= find_slot (symtab
,
19871 old_entries
[i
]->name
);
19872 *slot
= old_entries
[i
];
19876 xfree (old_entries
);
19879 /* Add an entry to SYMTAB. NAME is the name of the symbol.
19880 CU_INDEX is the index of the CU in which the symbol appears.
19881 IS_STATIC is one if the symbol is static, otherwise zero (global). */
19884 add_index_entry (struct mapped_symtab
*symtab
, const char *name
,
19885 int is_static
, gdb_index_symbol_kind kind
,
19886 offset_type cu_index
)
19888 struct symtab_index_entry
**slot
;
19889 offset_type cu_index_and_attrs
;
19891 ++symtab
->n_elements
;
19892 if (4 * symtab
->n_elements
/ 3 >= symtab
->size
)
19893 hash_expand (symtab
);
19895 slot
= find_slot (symtab
, name
);
19898 *slot
= XNEW (struct symtab_index_entry
);
19899 (*slot
)->name
= name
;
19900 /* index_offset is set later. */
19901 (*slot
)->cu_indices
= NULL
;
19904 cu_index_and_attrs
= 0;
19905 DW2_GDB_INDEX_CU_SET_VALUE (cu_index_and_attrs
, cu_index
);
19906 DW2_GDB_INDEX_SYMBOL_STATIC_SET_VALUE (cu_index_and_attrs
, is_static
);
19907 DW2_GDB_INDEX_SYMBOL_KIND_SET_VALUE (cu_index_and_attrs
, kind
);
19909 /* We don't want to record an index value twice as we want to avoid the
19911 We process all global symbols and then all static symbols
19912 (which would allow us to avoid the duplication by only having to check
19913 the last entry pushed), but a symbol could have multiple kinds in one CU.
19914 To keep things simple we don't worry about the duplication here and
19915 sort and uniqufy the list after we've processed all symbols. */
19916 VEC_safe_push (offset_type
, (*slot
)->cu_indices
, cu_index_and_attrs
);
19919 /* qsort helper routine for uniquify_cu_indices. */
19922 offset_type_compare (const void *ap
, const void *bp
)
19924 offset_type a
= *(offset_type
*) ap
;
19925 offset_type b
= *(offset_type
*) bp
;
19927 return (a
> b
) - (b
> a
);
19930 /* Sort and remove duplicates of all symbols' cu_indices lists. */
19933 uniquify_cu_indices (struct mapped_symtab
*symtab
)
19937 for (i
= 0; i
< symtab
->size
; ++i
)
19939 struct symtab_index_entry
*entry
= symtab
->data
[i
];
19942 && entry
->cu_indices
!= NULL
)
19944 unsigned int next_to_insert
, next_to_check
;
19945 offset_type last_value
;
19947 qsort (VEC_address (offset_type
, entry
->cu_indices
),
19948 VEC_length (offset_type
, entry
->cu_indices
),
19949 sizeof (offset_type
), offset_type_compare
);
19951 last_value
= VEC_index (offset_type
, entry
->cu_indices
, 0);
19952 next_to_insert
= 1;
19953 for (next_to_check
= 1;
19954 next_to_check
< VEC_length (offset_type
, entry
->cu_indices
);
19957 if (VEC_index (offset_type
, entry
->cu_indices
, next_to_check
)
19960 last_value
= VEC_index (offset_type
, entry
->cu_indices
,
19962 VEC_replace (offset_type
, entry
->cu_indices
, next_to_insert
,
19967 VEC_truncate (offset_type
, entry
->cu_indices
, next_to_insert
);
19972 /* Add a vector of indices to the constant pool. */
19975 add_indices_to_cpool (htab_t symbol_hash_table
, struct obstack
*cpool
,
19976 struct symtab_index_entry
*entry
)
19980 slot
= htab_find_slot (symbol_hash_table
, entry
, INSERT
);
19983 offset_type len
= VEC_length (offset_type
, entry
->cu_indices
);
19984 offset_type val
= MAYBE_SWAP (len
);
19989 entry
->index_offset
= obstack_object_size (cpool
);
19991 obstack_grow (cpool
, &val
, sizeof (val
));
19993 VEC_iterate (offset_type
, entry
->cu_indices
, i
, iter
);
19996 val
= MAYBE_SWAP (iter
);
19997 obstack_grow (cpool
, &val
, sizeof (val
));
20002 struct symtab_index_entry
*old_entry
= *slot
;
20003 entry
->index_offset
= old_entry
->index_offset
;
20006 return entry
->index_offset
;
20009 /* Write the mapped hash table SYMTAB to the obstack OUTPUT, with
20010 constant pool entries going into the obstack CPOOL. */
20013 write_hash_table (struct mapped_symtab
*symtab
,
20014 struct obstack
*output
, struct obstack
*cpool
)
20017 htab_t symbol_hash_table
;
20020 symbol_hash_table
= create_symbol_hash_table ();
20021 str_table
= create_strtab ();
20023 /* We add all the index vectors to the constant pool first, to
20024 ensure alignment is ok. */
20025 for (i
= 0; i
< symtab
->size
; ++i
)
20027 if (symtab
->data
[i
])
20028 add_indices_to_cpool (symbol_hash_table
, cpool
, symtab
->data
[i
]);
20031 /* Now write out the hash table. */
20032 for (i
= 0; i
< symtab
->size
; ++i
)
20034 offset_type str_off
, vec_off
;
20036 if (symtab
->data
[i
])
20038 str_off
= add_string (str_table
, cpool
, symtab
->data
[i
]->name
);
20039 vec_off
= symtab
->data
[i
]->index_offset
;
20043 /* While 0 is a valid constant pool index, it is not valid
20044 to have 0 for both offsets. */
20049 str_off
= MAYBE_SWAP (str_off
);
20050 vec_off
= MAYBE_SWAP (vec_off
);
20052 obstack_grow (output
, &str_off
, sizeof (str_off
));
20053 obstack_grow (output
, &vec_off
, sizeof (vec_off
));
20056 htab_delete (str_table
);
20057 htab_delete (symbol_hash_table
);
20060 /* Struct to map psymtab to CU index in the index file. */
20061 struct psymtab_cu_index_map
20063 struct partial_symtab
*psymtab
;
20064 unsigned int cu_index
;
20068 hash_psymtab_cu_index (const void *item
)
20070 const struct psymtab_cu_index_map
*map
= item
;
20072 return htab_hash_pointer (map
->psymtab
);
20076 eq_psymtab_cu_index (const void *item_lhs
, const void *item_rhs
)
20078 const struct psymtab_cu_index_map
*lhs
= item_lhs
;
20079 const struct psymtab_cu_index_map
*rhs
= item_rhs
;
20081 return lhs
->psymtab
== rhs
->psymtab
;
20084 /* Helper struct for building the address table. */
20085 struct addrmap_index_data
20087 struct objfile
*objfile
;
20088 struct obstack
*addr_obstack
;
20089 htab_t cu_index_htab
;
20091 /* Non-zero if the previous_* fields are valid.
20092 We can't write an entry until we see the next entry (since it is only then
20093 that we know the end of the entry). */
20094 int previous_valid
;
20095 /* Index of the CU in the table of all CUs in the index file. */
20096 unsigned int previous_cu_index
;
20097 /* Start address of the CU. */
20098 CORE_ADDR previous_cu_start
;
20101 /* Write an address entry to OBSTACK. */
20104 add_address_entry (struct objfile
*objfile
, struct obstack
*obstack
,
20105 CORE_ADDR start
, CORE_ADDR end
, unsigned int cu_index
)
20107 offset_type cu_index_to_write
;
20109 CORE_ADDR baseaddr
;
20111 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
20113 store_unsigned_integer (addr
, 8, BFD_ENDIAN_LITTLE
, start
- baseaddr
);
20114 obstack_grow (obstack
, addr
, 8);
20115 store_unsigned_integer (addr
, 8, BFD_ENDIAN_LITTLE
, end
- baseaddr
);
20116 obstack_grow (obstack
, addr
, 8);
20117 cu_index_to_write
= MAYBE_SWAP (cu_index
);
20118 obstack_grow (obstack
, &cu_index_to_write
, sizeof (offset_type
));
20121 /* Worker function for traversing an addrmap to build the address table. */
20124 add_address_entry_worker (void *datap
, CORE_ADDR start_addr
, void *obj
)
20126 struct addrmap_index_data
*data
= datap
;
20127 struct partial_symtab
*pst
= obj
;
20129 if (data
->previous_valid
)
20130 add_address_entry (data
->objfile
, data
->addr_obstack
,
20131 data
->previous_cu_start
, start_addr
,
20132 data
->previous_cu_index
);
20134 data
->previous_cu_start
= start_addr
;
20137 struct psymtab_cu_index_map find_map
, *map
;
20138 find_map
.psymtab
= pst
;
20139 map
= htab_find (data
->cu_index_htab
, &find_map
);
20140 gdb_assert (map
!= NULL
);
20141 data
->previous_cu_index
= map
->cu_index
;
20142 data
->previous_valid
= 1;
20145 data
->previous_valid
= 0;
20150 /* Write OBJFILE's address map to OBSTACK.
20151 CU_INDEX_HTAB is used to map addrmap entries to their CU indices
20152 in the index file. */
20155 write_address_map (struct objfile
*objfile
, struct obstack
*obstack
,
20156 htab_t cu_index_htab
)
20158 struct addrmap_index_data addrmap_index_data
;
20160 /* When writing the address table, we have to cope with the fact that
20161 the addrmap iterator only provides the start of a region; we have to
20162 wait until the next invocation to get the start of the next region. */
20164 addrmap_index_data
.objfile
= objfile
;
20165 addrmap_index_data
.addr_obstack
= obstack
;
20166 addrmap_index_data
.cu_index_htab
= cu_index_htab
;
20167 addrmap_index_data
.previous_valid
= 0;
20169 addrmap_foreach (objfile
->psymtabs_addrmap
, add_address_entry_worker
,
20170 &addrmap_index_data
);
20172 /* It's highly unlikely the last entry (end address = 0xff...ff)
20173 is valid, but we should still handle it.
20174 The end address is recorded as the start of the next region, but that
20175 doesn't work here. To cope we pass 0xff...ff, this is a rare situation
20177 if (addrmap_index_data
.previous_valid
)
20178 add_address_entry (objfile
, obstack
,
20179 addrmap_index_data
.previous_cu_start
, (CORE_ADDR
) -1,
20180 addrmap_index_data
.previous_cu_index
);
20183 /* Return the symbol kind of PSYM. */
20185 static gdb_index_symbol_kind
20186 symbol_kind (struct partial_symbol
*psym
)
20188 domain_enum domain
= PSYMBOL_DOMAIN (psym
);
20189 enum address_class aclass
= PSYMBOL_CLASS (psym
);
20197 return GDB_INDEX_SYMBOL_KIND_FUNCTION
;
20199 return GDB_INDEX_SYMBOL_KIND_TYPE
;
20201 case LOC_CONST_BYTES
:
20202 case LOC_OPTIMIZED_OUT
:
20204 return GDB_INDEX_SYMBOL_KIND_VARIABLE
;
20206 /* Note: It's currently impossible to recognize psyms as enum values
20207 short of reading the type info. For now punt. */
20208 return GDB_INDEX_SYMBOL_KIND_VARIABLE
;
20210 /* There are other LOC_FOO values that one might want to classify
20211 as variables, but dwarf2read.c doesn't currently use them. */
20212 return GDB_INDEX_SYMBOL_KIND_OTHER
;
20214 case STRUCT_DOMAIN
:
20215 return GDB_INDEX_SYMBOL_KIND_TYPE
;
20217 return GDB_INDEX_SYMBOL_KIND_OTHER
;
20221 /* Add a list of partial symbols to SYMTAB. */
20224 write_psymbols (struct mapped_symtab
*symtab
,
20226 struct partial_symbol
**psymp
,
20228 offset_type cu_index
,
20231 for (; count
-- > 0; ++psymp
)
20233 struct partial_symbol
*psym
= *psymp
;
20236 if (SYMBOL_LANGUAGE (psym
) == language_ada
)
20237 error (_("Ada is not currently supported by the index"));
20239 /* Only add a given psymbol once. */
20240 slot
= htab_find_slot (psyms_seen
, psym
, INSERT
);
20243 gdb_index_symbol_kind kind
= symbol_kind (psym
);
20246 add_index_entry (symtab
, SYMBOL_SEARCH_NAME (psym
),
20247 is_static
, kind
, cu_index
);
20252 /* Write the contents of an ("unfinished") obstack to FILE. Throw an
20253 exception if there is an error. */
20256 write_obstack (FILE *file
, struct obstack
*obstack
)
20258 if (fwrite (obstack_base (obstack
), 1, obstack_object_size (obstack
),
20260 != obstack_object_size (obstack
))
20261 error (_("couldn't data write to file"));
20264 /* Unlink a file if the argument is not NULL. */
20267 unlink_if_set (void *p
)
20269 char **filename
= p
;
20271 unlink (*filename
);
20274 /* A helper struct used when iterating over debug_types. */
20275 struct signatured_type_index_data
20277 struct objfile
*objfile
;
20278 struct mapped_symtab
*symtab
;
20279 struct obstack
*types_list
;
20284 /* A helper function that writes a single signatured_type to an
20288 write_one_signatured_type (void **slot
, void *d
)
20290 struct signatured_type_index_data
*info
= d
;
20291 struct signatured_type
*entry
= (struct signatured_type
*) *slot
;
20292 struct dwarf2_per_cu_data
*per_cu
= &entry
->per_cu
;
20293 struct partial_symtab
*psymtab
= per_cu
->v
.psymtab
;
20296 write_psymbols (info
->symtab
,
20298 info
->objfile
->global_psymbols
.list
20299 + psymtab
->globals_offset
,
20300 psymtab
->n_global_syms
, info
->cu_index
,
20302 write_psymbols (info
->symtab
,
20304 info
->objfile
->static_psymbols
.list
20305 + psymtab
->statics_offset
,
20306 psymtab
->n_static_syms
, info
->cu_index
,
20309 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
,
20310 entry
->per_cu
.offset
.sect_off
);
20311 obstack_grow (info
->types_list
, val
, 8);
20312 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
,
20313 entry
->type_offset_in_tu
.cu_off
);
20314 obstack_grow (info
->types_list
, val
, 8);
20315 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
, entry
->signature
);
20316 obstack_grow (info
->types_list
, val
, 8);
20323 /* Recurse into all "included" dependencies and write their symbols as
20324 if they appeared in this psymtab. */
20327 recursively_write_psymbols (struct objfile
*objfile
,
20328 struct partial_symtab
*psymtab
,
20329 struct mapped_symtab
*symtab
,
20331 offset_type cu_index
)
20335 for (i
= 0; i
< psymtab
->number_of_dependencies
; ++i
)
20336 if (psymtab
->dependencies
[i
]->user
!= NULL
)
20337 recursively_write_psymbols (objfile
, psymtab
->dependencies
[i
],
20338 symtab
, psyms_seen
, cu_index
);
20340 write_psymbols (symtab
,
20342 objfile
->global_psymbols
.list
+ psymtab
->globals_offset
,
20343 psymtab
->n_global_syms
, cu_index
,
20345 write_psymbols (symtab
,
20347 objfile
->static_psymbols
.list
+ psymtab
->statics_offset
,
20348 psymtab
->n_static_syms
, cu_index
,
20352 /* Create an index file for OBJFILE in the directory DIR. */
20355 write_psymtabs_to_index (struct objfile
*objfile
, const char *dir
)
20357 struct cleanup
*cleanup
;
20358 char *filename
, *cleanup_filename
;
20359 struct obstack contents
, addr_obstack
, constant_pool
, symtab_obstack
;
20360 struct obstack cu_list
, types_cu_list
;
20363 struct mapped_symtab
*symtab
;
20364 offset_type val
, size_of_contents
, total_len
;
20367 htab_t cu_index_htab
;
20368 struct psymtab_cu_index_map
*psymtab_cu_index_map
;
20370 if (!objfile
->psymtabs
|| !objfile
->psymtabs_addrmap
)
20373 if (dwarf2_per_objfile
->using_index
)
20374 error (_("Cannot use an index to create the index"));
20376 if (VEC_length (dwarf2_section_info_def
, dwarf2_per_objfile
->types
) > 1)
20377 error (_("Cannot make an index when the file has multiple .debug_types sections"));
20379 if (stat (objfile
->name
, &st
) < 0)
20380 perror_with_name (objfile
->name
);
20382 filename
= concat (dir
, SLASH_STRING
, lbasename (objfile
->name
),
20383 INDEX_SUFFIX
, (char *) NULL
);
20384 cleanup
= make_cleanup (xfree
, filename
);
20386 out_file
= fopen (filename
, "wb");
20388 error (_("Can't open `%s' for writing"), filename
);
20390 cleanup_filename
= filename
;
20391 make_cleanup (unlink_if_set
, &cleanup_filename
);
20393 symtab
= create_mapped_symtab ();
20394 make_cleanup (cleanup_mapped_symtab
, symtab
);
20396 obstack_init (&addr_obstack
);
20397 make_cleanup_obstack_free (&addr_obstack
);
20399 obstack_init (&cu_list
);
20400 make_cleanup_obstack_free (&cu_list
);
20402 obstack_init (&types_cu_list
);
20403 make_cleanup_obstack_free (&types_cu_list
);
20405 psyms_seen
= htab_create_alloc (100, htab_hash_pointer
, htab_eq_pointer
,
20406 NULL
, xcalloc
, xfree
);
20407 make_cleanup_htab_delete (psyms_seen
);
20409 /* While we're scanning CU's create a table that maps a psymtab pointer
20410 (which is what addrmap records) to its index (which is what is recorded
20411 in the index file). This will later be needed to write the address
20413 cu_index_htab
= htab_create_alloc (100,
20414 hash_psymtab_cu_index
,
20415 eq_psymtab_cu_index
,
20416 NULL
, xcalloc
, xfree
);
20417 make_cleanup_htab_delete (cu_index_htab
);
20418 psymtab_cu_index_map
= (struct psymtab_cu_index_map
*)
20419 xmalloc (sizeof (struct psymtab_cu_index_map
)
20420 * dwarf2_per_objfile
->n_comp_units
);
20421 make_cleanup (xfree
, psymtab_cu_index_map
);
20423 /* The CU list is already sorted, so we don't need to do additional
20424 work here. Also, the debug_types entries do not appear in
20425 all_comp_units, but only in their own hash table. */
20426 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
20428 struct dwarf2_per_cu_data
*per_cu
20429 = dwarf2_per_objfile
->all_comp_units
[i
];
20430 struct partial_symtab
*psymtab
= per_cu
->v
.psymtab
;
20432 struct psymtab_cu_index_map
*map
;
20435 if (psymtab
->user
== NULL
)
20436 recursively_write_psymbols (objfile
, psymtab
, symtab
, psyms_seen
, i
);
20438 map
= &psymtab_cu_index_map
[i
];
20439 map
->psymtab
= psymtab
;
20441 slot
= htab_find_slot (cu_index_htab
, map
, INSERT
);
20442 gdb_assert (slot
!= NULL
);
20443 gdb_assert (*slot
== NULL
);
20446 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
,
20447 per_cu
->offset
.sect_off
);
20448 obstack_grow (&cu_list
, val
, 8);
20449 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
, per_cu
->length
);
20450 obstack_grow (&cu_list
, val
, 8);
20453 /* Dump the address map. */
20454 write_address_map (objfile
, &addr_obstack
, cu_index_htab
);
20456 /* Write out the .debug_type entries, if any. */
20457 if (dwarf2_per_objfile
->signatured_types
)
20459 struct signatured_type_index_data sig_data
;
20461 sig_data
.objfile
= objfile
;
20462 sig_data
.symtab
= symtab
;
20463 sig_data
.types_list
= &types_cu_list
;
20464 sig_data
.psyms_seen
= psyms_seen
;
20465 sig_data
.cu_index
= dwarf2_per_objfile
->n_comp_units
;
20466 htab_traverse_noresize (dwarf2_per_objfile
->signatured_types
,
20467 write_one_signatured_type
, &sig_data
);
20470 /* Now that we've processed all symbols we can shrink their cu_indices
20472 uniquify_cu_indices (symtab
);
20474 obstack_init (&constant_pool
);
20475 make_cleanup_obstack_free (&constant_pool
);
20476 obstack_init (&symtab_obstack
);
20477 make_cleanup_obstack_free (&symtab_obstack
);
20478 write_hash_table (symtab
, &symtab_obstack
, &constant_pool
);
20480 obstack_init (&contents
);
20481 make_cleanup_obstack_free (&contents
);
20482 size_of_contents
= 6 * sizeof (offset_type
);
20483 total_len
= size_of_contents
;
20485 /* The version number. */
20486 val
= MAYBE_SWAP (8);
20487 obstack_grow (&contents
, &val
, sizeof (val
));
20489 /* The offset of the CU list from the start of the file. */
20490 val
= MAYBE_SWAP (total_len
);
20491 obstack_grow (&contents
, &val
, sizeof (val
));
20492 total_len
+= obstack_object_size (&cu_list
);
20494 /* The offset of the types CU list from the start of the file. */
20495 val
= MAYBE_SWAP (total_len
);
20496 obstack_grow (&contents
, &val
, sizeof (val
));
20497 total_len
+= obstack_object_size (&types_cu_list
);
20499 /* The offset of the address table from the start of the file. */
20500 val
= MAYBE_SWAP (total_len
);
20501 obstack_grow (&contents
, &val
, sizeof (val
));
20502 total_len
+= obstack_object_size (&addr_obstack
);
20504 /* The offset of the symbol table from the start of the file. */
20505 val
= MAYBE_SWAP (total_len
);
20506 obstack_grow (&contents
, &val
, sizeof (val
));
20507 total_len
+= obstack_object_size (&symtab_obstack
);
20509 /* The offset of the constant pool from the start of the file. */
20510 val
= MAYBE_SWAP (total_len
);
20511 obstack_grow (&contents
, &val
, sizeof (val
));
20512 total_len
+= obstack_object_size (&constant_pool
);
20514 gdb_assert (obstack_object_size (&contents
) == size_of_contents
);
20516 write_obstack (out_file
, &contents
);
20517 write_obstack (out_file
, &cu_list
);
20518 write_obstack (out_file
, &types_cu_list
);
20519 write_obstack (out_file
, &addr_obstack
);
20520 write_obstack (out_file
, &symtab_obstack
);
20521 write_obstack (out_file
, &constant_pool
);
20525 /* We want to keep the file, so we set cleanup_filename to NULL
20526 here. See unlink_if_set. */
20527 cleanup_filename
= NULL
;
20529 do_cleanups (cleanup
);
20532 /* Implementation of the `save gdb-index' command.
20534 Note that the file format used by this command is documented in the
20535 GDB manual. Any changes here must be documented there. */
20538 save_gdb_index_command (char *arg
, int from_tty
)
20540 struct objfile
*objfile
;
20543 error (_("usage: save gdb-index DIRECTORY"));
20545 ALL_OBJFILES (objfile
)
20549 /* If the objfile does not correspond to an actual file, skip it. */
20550 if (stat (objfile
->name
, &st
) < 0)
20553 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
20554 if (dwarf2_per_objfile
)
20556 volatile struct gdb_exception except
;
20558 TRY_CATCH (except
, RETURN_MASK_ERROR
)
20560 write_psymtabs_to_index (objfile
, arg
);
20562 if (except
.reason
< 0)
20563 exception_fprintf (gdb_stderr
, except
,
20564 _("Error while writing index for `%s': "),
20572 int dwarf2_always_disassemble
;
20575 show_dwarf2_always_disassemble (struct ui_file
*file
, int from_tty
,
20576 struct cmd_list_element
*c
, const char *value
)
20578 fprintf_filtered (file
,
20579 _("Whether to always disassemble "
20580 "DWARF expressions is %s.\n"),
20585 show_check_physname (struct ui_file
*file
, int from_tty
,
20586 struct cmd_list_element
*c
, const char *value
)
20588 fprintf_filtered (file
,
20589 _("Whether to check \"physname\" is %s.\n"),
20593 void _initialize_dwarf2_read (void);
20596 _initialize_dwarf2_read (void)
20598 struct cmd_list_element
*c
;
20600 dwarf2_objfile_data_key
20601 = register_objfile_data_with_cleanup (NULL
, dwarf2_per_objfile_free
);
20603 add_prefix_cmd ("dwarf2", class_maintenance
, set_dwarf2_cmd
, _("\
20604 Set DWARF 2 specific variables.\n\
20605 Configure DWARF 2 variables such as the cache size"),
20606 &set_dwarf2_cmdlist
, "maintenance set dwarf2 ",
20607 0/*allow-unknown*/, &maintenance_set_cmdlist
);
20609 add_prefix_cmd ("dwarf2", class_maintenance
, show_dwarf2_cmd
, _("\
20610 Show DWARF 2 specific variables\n\
20611 Show DWARF 2 variables such as the cache size"),
20612 &show_dwarf2_cmdlist
, "maintenance show dwarf2 ",
20613 0/*allow-unknown*/, &maintenance_show_cmdlist
);
20615 add_setshow_zinteger_cmd ("max-cache-age", class_obscure
,
20616 &dwarf2_max_cache_age
, _("\
20617 Set the upper bound on the age of cached dwarf2 compilation units."), _("\
20618 Show the upper bound on the age of cached dwarf2 compilation units."), _("\
20619 A higher limit means that cached compilation units will be stored\n\
20620 in memory longer, and more total memory will be used. Zero disables\n\
20621 caching, which can slow down startup."),
20623 show_dwarf2_max_cache_age
,
20624 &set_dwarf2_cmdlist
,
20625 &show_dwarf2_cmdlist
);
20627 add_setshow_boolean_cmd ("always-disassemble", class_obscure
,
20628 &dwarf2_always_disassemble
, _("\
20629 Set whether `info address' always disassembles DWARF expressions."), _("\
20630 Show whether `info address' always disassembles DWARF expressions."), _("\
20631 When enabled, DWARF expressions are always printed in an assembly-like\n\
20632 syntax. When disabled, expressions will be printed in a more\n\
20633 conversational style, when possible."),
20635 show_dwarf2_always_disassemble
,
20636 &set_dwarf2_cmdlist
,
20637 &show_dwarf2_cmdlist
);
20639 add_setshow_boolean_cmd ("dwarf2-read", no_class
, &dwarf2_read_debug
, _("\
20640 Set debugging of the dwarf2 reader."), _("\
20641 Show debugging of the dwarf2 reader."), _("\
20642 When enabled, debugging messages are printed during dwarf2 reading\n\
20643 and symtab expansion."),
20646 &setdebuglist
, &showdebuglist
);
20648 add_setshow_zuinteger_cmd ("dwarf2-die", no_class
, &dwarf2_die_debug
, _("\
20649 Set debugging of the dwarf2 DIE reader."), _("\
20650 Show debugging of the dwarf2 DIE reader."), _("\
20651 When enabled (non-zero), DIEs are dumped after they are read in.\n\
20652 The value is the maximum depth to print."),
20655 &setdebuglist
, &showdebuglist
);
20657 add_setshow_boolean_cmd ("check-physname", no_class
, &check_physname
, _("\
20658 Set cross-checking of \"physname\" code against demangler."), _("\
20659 Show cross-checking of \"physname\" code against demangler."), _("\
20660 When enabled, GDB's internal \"physname\" code is checked against\n\
20662 NULL
, show_check_physname
,
20663 &setdebuglist
, &showdebuglist
);
20665 add_setshow_boolean_cmd ("use-deprecated-index-sections",
20666 no_class
, &use_deprecated_index_sections
, _("\
20667 Set whether to use deprecated gdb_index sections."), _("\
20668 Show whether to use deprecated gdb_index sections."), _("\
20669 When enabled, deprecated .gdb_index sections are used anyway.\n\
20670 Normally they are ignored either because of a missing feature or\n\
20671 performance issue.\n\
20672 Warning: This option must be enabled before gdb reads the file."),
20675 &setlist
, &showlist
);
20677 c
= add_cmd ("gdb-index", class_files
, save_gdb_index_command
,
20679 Save a gdb-index file.\n\
20680 Usage: save gdb-index DIRECTORY"),
20682 set_cmd_completer (c
, filename_completer
);